Heredity: Crash Course Biology #9

[@alexnicole1969]

I appreciate the earwax example instead of hearing about Mendel's peas for the hundred millionth time

[@aledlast5578]

When i got taught about this they kept bringing up the tongue rolling / non-tongue rolling allele lmao

[@Chelszzzyo]

RIGHT

[@skulldragon3799]

Alex Nicole *FACTS*

[@SamTTrevino]

When I become a practicing doctor I’m sending crashcourse money. You guys make these topics digestible, entertaining, and informative. Love you guys!

[@ShelelleO3O]

John: "If we're doing Punnett Squares, I'm leaving!" I have never related to anything more in my life.

[@bhargavagowda8434]

+ShelelleO3O punnett squares ftw.

[@TasX]

+Bhargava Gowda Dude, I feel sorry for your life

[@charley6799]

+Yutian punnet squares are super EZ though!

[@bhargavagowda8434]

+Charley Castle and super uzeful

[@bhargavagowda8434]

+Charley Castle and super uzeful

[@ericahorne5419]

I am a 42 year old college senior and these Crash Course videos have been AMAZING!! I am taking my last course to graduate; an accelerated summer course in, of all things, Biology! :'( Having ZERO previous classes in Chemistry, Biology or Anatomy, I would have never passed this course. I had to learn 4 chapters a week and take an exam on the covered material. The Biology crash course series has been my lifeline in helping me visualize what I am learning and make the concepts easier to grasp and retain. THANK YOU, THANK YOU, THANK YOU HANK GREEN!!! I have received an C on one exam and a B on the other, thanks to you!! Your method of instruction is simply awesome! Keep up the great work!

[@mateenabbasi4815]

Hank : "As it happens, John and I have the exact same parents." John : "Yes, Mom and Dad Green" lol

[@tobe_ale]

Please write textbooks, please CrashCourse, please write textbooks.

[@natecastronovo]

Indeed.

[@stefanli1755]

YASS

[@rohanghoshdastidar1047]

Yeah PLZZZZZ 😭😭😭😭

[@abdulahad04]

no

[@priyanshiparmar4385]

IKRRRRRRR

[@morganwaas4868]

Hey fun fact: the allele for dwarfism is dominant. One more, I can't resist this one: the gene that allows you to grow hair in your ears when you age is located on the Y-chromosome, so only men can do it.

[@queensaharaice7376]

Woah! That's a cool fact😮 5 years later and you're still teaching people👀🙏

[@jayknight139]

Yay! Free knowledge 😃

[@Chriskeaten]

I love the Green brothers. They make sitting down with a cup of coffee, and relearning a few things about genetics, an enjoyable experience.

[@daaaniphantom]

***** I'm literally doing that very act. haha so true

[@biancabill6519]

***** I would rather be in your position- I am cramming for a bio exam and am way too stressed

[@Chriskeaten]

Bianca Bill *pat pat* you'll do fine

[@FROPDESAI]

***** how did the pat pat not become bold tho?

[@biancabill6519]

+Chriskeaten aw thank you! I think I did ok...but it's summer so I'm happy

[@tohdohsibir]

Lol but John, Punnett squares are the easiest part in genetics.

[@nitoritou]

So true.

[@Getoffmearse]

+Thùy-Anh Thái If that's the easiest part of genetics, I don't even want to think about what you consider hard, lol.

[@tohdohsibir]

***** Non-Mendelian genetics, chromosome mapping, the genetics of cancer, and recombinant DNA biotechnology are a pain in the butt to learn. Punnett squares are the least of my problems haha. #medstudentstruggles

[@sleepyenby8036]

I KNOW! I'm in 7th grade pre AP biology and this is what we did last week

[@havealikeandsub]

+Thùy-Anh Thái until shit gets real....and you just do math all day

[@chellooza]

*Looks at parents* YOU GAVE ME THE UGLY

[@fadyfarouk8635]

dont be so mean to yourself you look nice☺

[@ishaikaru6311]

u r flirting with her now

[@ezekielmoreton3788]

He's just being nice

[@bangasou12]

too funny

[@pepper2176]

Your profile pic of yourself looks really pretty.

[@zannacart8533]

Okay I have an exam in three hours thank you

[@prashantjha9824]

10 min video for 3 hours......smart B-)

[@sully730sullivan2]

hi

[@ashortginger]

+Zanna C Art same

[@icydive4223]

You play League? I play Wizard101.

[@吴悠-x6b]

+Icy Dive422 XD? yuwenzhouswf

[@toaruargonaut4254]

Hank: it’s to be expected that John and I would have similar physical characteristics... Me: *kept my mouth shut out of embarrassment as I thought they are the same person of different ages one week ago*

[@madisonc1588]

I can't stop laughing! John: And people have been noticing that brothers tend to look alike since like people started noticing stuff or whatever. Hank: That's very scientific, John. John: I will remind you that I'm doing you a favor XD XD

[@ItsJustBell_]

My mom when she asks me to do the dishes on her day Me: I washed the dishes. Mom: They're is still food on these plates. Me: I will remind you i'm doing you a favor.

[@alexl1178]

Mom: *Gets out the broomstick* Me: *Is out of the house, running 20mph*

[@connorfassold3855]

MC Spirit Wolf rawr xD

[@genesis-fortnite259]

Cringe

[@haleysaul7114]

This is me and my brother!!😂😂🤣

[@NoaDBSK]

One thing I know for sure is that the Green family is blessed with damn awesome genes. Both Hank and John are incredibly eloquent and I seriously enjoy listening to them talk. ♥

[@amabitsapiens]

Meeow... ;-) *cough* Sorry, something in my throat. What I was trying to say was, "I agree."

[@Strix182]

You leave my father's ears out of this!

[@mattsnib]

good job mum. im colourblind and balding.

[@skylarkenneth2407]

Thank Science for allowing offspring to live on with advances in medicine :) Over 50% men will be genetically predisposed to become bald, color blind, diabetic and have high blood pressure by 2050 XP. One the plus side, we are more likely endure all of this shame and embarrassment for 80+ years of our lives :) Once again....Thanks, Science....

[@toaster7239]

Snibm S what a very beautiful blue, green, and red profile picture

[@mozzy900]

Also colorblind

[@Rainbow-br1pm]

U guys don't know how much your channel helps me. Please don't stop making theses videos.

[@GeneticsLessons]

These videos probably a good way to entertain yourself... and learn something new... keep doing.

[@memeal6328]

+Nikolay's Genetics Lessons Your videos helped me more, these are fun for kids in middle school I'm assuming. Students who are looking for genetics class info need to go into more details.

[@genesis-fortnite259]

If these entertain u, u have no friends or a life

[@therealmclovin8689]

bud he is a genetic teacher this is what makes him money come on use common sense.

[@sabinekine2737]

if these don't entertain you and instead whining in youtube comments does, I'm afraid you're a loser.

[@gangrenekills1281]

@@genesis-fortnite259 says the guy/gal who uses Fortnite for his/her name

[@aran_tripathi]

imagine John having to record this and stare to his right for like 15 seconds and then answer like he was listening the whole time

[@megk1025]

Okay, I have two things to say - The first thing, this video is fantastic - I'm studying biology in school at the moment and I do understand what's going on, but some parts are very confusing. This video clears everything up in a fun and interesting way and for that I want to say thank you. The second thing is, I am just now realizing (after watching this video three times) that John is actually John Green, as in the famous writer John Green, as in my favourite author John Green and it is blowing my mind.

[@Ad4mco]

"Signor Sperm and Madame Egg". Definitely booking a dinner reservation under these names..

[@incongruentinterrobangs924]

Yes! Oh so much yes!

[@CoalChrome]

all of the yes

[@theweirdo2187]

Lol

[@thomasross4578]

When 1 video sums up an entire semester of Honors biology 🤑

[@zakfireblast2731]

+Thomas Ross Its amazing right?

[@tonyantonio2]

+Thomas Ross When 1 video sums up 1 second in AP Bio

[@qassim094]

+tonyantonio Bitch please. When the entire anatomy and physiology playlist doesn't even sum up a thousandth of a second in Med school.

[@tonyantonio2]

Kaneki i can hear hell

[@sejutym_28]

The sad moment when this is true.

[@mhgr129]

It's 2020 and I'm watching this video for my Biology course in college. Thank you for these educational videos that will continue to help people learn for years and years. I am really grateful for this KZbin channel.

[@Jessica-yp8uy]

I still can't get over the fact that these videos are so incredibly clear and to the point, while my biology book covers all this stuff in about 60 pages

[@glom9995]

Thank god for an easy chapter after all that respiration and photosynthesis.

[@noyaaaaa_]

Gregory Lombana lol ap bio

[@saadrehman362]

for real lmao

[@kayadahlke4218]

😂 I was just thinking the same!

[@zenaahmad7367]

Gregory Lombana we

[@aria9912]

Honestly I understand it so much more in ten minutes than when my teacher has explained it in like 20 lessons

[@jimmykarlos8119]

just randomly learning about biology today and have realized that hank is an actual powerhouse of a content creator, like god damn this man has so many channels its mind blowing

[@valhernandez4247]

I passed my exam because of you! One more semester and graduation! Thank you!

[@MariposaRedimida]

I actually had no idea ear wax could be either dry or wet... I must have the wet kind... not even sure.

[@jordynisboredyn]

Ear wax... Water... I now have wet ear wax! If you want the dry one stand in the middle of a dessert.

[@iiAngelic]

+Mariposa Redimida Ew, warning, don't read this while you're eating food.

[@bhargavagowda8434]

+Vivi33 eating people!? We're cannibals now? And ear wax is more digusting than cannibalism!? lol jk.

[@bhargavagowda8434]

+Vivi33 eating people!? We're cannibals now? And ear wax is more digusting than cannibalism!? lol jk.

[@iiAngelic]

Bhargava Gowda LOL I didn't even realize it said people. I meant to say food! Eating food!

[@nadiag7759]

Absolutely love these Crash Courses! They're so hekpful in a fast-paced ap bio class. Hank makes learning so much more fun and easier! Just wow, I'm amazed!

[@luismatta9790]

These guys are brothers of awesomeness

[@tacopanda3630]

This has more info and more entertaining than my normal Biology teacher's lectures.

[@nupurraval3314]

John green is a great man. Thank you for giving me the fault in our stars

[@FROPDESAI]

Nupur Raval *Looking for Alaska *paper towns

[@nupurraval3314]

what FROP DESAI

[@FROPDESAI]

Nupur Raval I added better books by him.

[@janetyu3838]

FROP DESAI Looking for Alaska, the feels ;-;

[@nupurraval3314]

Janet Yu omg i just read the book paper towns now i cant wait for the movie i watched the trailer its so good

[@orbemsolis]

Why earwax? why not hair? HAIRedity

[@lindseyvalancius7690]

Ethen Sun Randomness Hair has multiple genes that code for it; it's a polygenic trait. Ear wax only has one gene that codes for it, making it much simpler to describe in a ten minute video.

[@orbemsolis]

Lindsey Valancius I know, just joking.

[@nato7ify]

Ethen Sun Randomness shut up

[@orbemsolis]

Nate Heroux pineapple. I wish i could tell you to shut uup back, but I'm Canadian. So could you please shut up?

[@heyitsliv5396]

Ethen Sun Randomness XD wait you can't say that in Cananda?

[@DevonCosmos]

I love seeing those two interact. It's always a pleasurable experience.

[@oliviafusco9147]

THIS EXPLAINS SO MUCH I WAS WONDERING WHY HE SOUNDED AND LOOKED FAMILIR 😅😂❤YOUR BROTHER HELPED ME PASS HISTORY 😂❤

[@JingLiisnotreal]

I love how they just represent sibling relationships in the most passive aggressive ways. "O-oh, you're back." "Yeah. You sound surprised." "Ah, you are so much smarter than you look." "I had to go call John, because he's not participating, because he doesn't like Punnett Squares"

[@idaquisth9725]

I have a test tomorrow and Im just watching these videos on repeat to prepare, this is sooo much better than my bio-teachers explanations

[@willm3027]

Ida Quisth same😝

[@chibij3983]

I love this channel and the ameoba sisters when ever my teachers teaches a lesson. So when John Green appeared on the screen I turned to my bestie who sits right behind me all excited like. " Thats John Green. " She looked at me confused saying " what" I kept pointing and waving my arm at the screen. " He wrote the fault in our stars" she still didn't understand and I stopped bouncing around in my seat once I noticed people gazes. After being gone for a few days I come back only to look like a total dork. Love your videos by the way

[@evarogue8074]

who else is here cramming for exams

[@briansataray2467]

Biology is hella easy, I just watch this because this dude is hella funny.

[@noelleluvzz7176]

my exam is tomorrow and my mom told me to "study" so now im here

[@theonlybingledingle]

@@briansataray2467 Cool, just because it's easy for you doesn't mean it's easy for everyone else

[@Bauerdragon123]

Dude. My homework was to watch this and take notes.

[@HD-nq5rh]

Hi

[@caedacaeda4417]

crash course always saving my life. I have finals😭

[@natsutan8552]

I’ve learned more from this video from an entire semester’s worth of science class. I have an exam in 10 hours. Thank you for saving my grades.

[@fazeautism77]

you have no clue how much I love you and your ear wax right now.

[@_honeybee14]

My biology teacher at ASU requires us to watch this for homework! Keep up the awesome videos! (:

[@marie-zz2kk]

Hallelujah thank you so much I found a way to catch up to the lessons I missed omg praise the Lord

[@stephaniemcnugg9693]

Neza-chan Marie Is your profile pic what I think it iS

[@thepip3599]

My dad has a massive nose, and most of my siblings also have pretty large noses, but my sister has a tiny button nose. I guess big noses are dominant, or something?

[@lilbihxxx1234]

They are. And so are big lips.

[@jargongaming5172]

+The Pip Lol, Jews.

[@Roma-kp4qg]

And curly hair apparently Thanks, dad. I live in constant fear that some random stranger will start cooing how fluffy my hair is.

[@hannahheller8474]

Is there a crashcourse that talks about pedigrees and codominance/incomplete dominance and blood typing?

[@codextraordinary]

+Hannah H. there's a great amoeba sisters episode about this.

[@jeeva1996]

+mormander thanks

[@garrettludescher9588]

amoeba sisters are lit

[@munishthakur4431]

o

[@asolomone]

when he said "buffalo or squid or whatever" I bursted out laughing Also god bless because now I'm not entirely screwed for my exam :D

[@aimeevanwijk5569]

lmao same it's 5:30 in the morning and my exam is at 8

[@callinstocker6486]

I love the way you guys approach biology on this channel. My Bio professor's approach to this same topic was to give us scenarios where we had to look at a family and determine if the wife had an affair with her husband based on the children's phenotypes for specific traits. Thanks for all your help, Keep up the good work!!

[@jennifergrams4566]

All the variables in genetics dosent cross over in a book but your illustrations do! They show the activity of what's happening. Thanks.

[@alienforareason]

People watching in 2024😂❤

[@RenanMeloC]

What the hell??? I thought you were the same person!! WHAAAAAAAAAAT!!

[@lavaniadelrey2807]

Renan Melo u must be new here

[@harshithgowni1528]

@@lavaniadelrey2807 Says it 5 years later

[@MrPewPews]

@@harshithgowni1528 hahahaha

[@krishacz]

"austrian monk" _grumbles in czech_

[@kayvons5142]

When Mendel was born grumbles was Austrian territory

[@Volteer]

He also went to the University of Vienna

[@LOLZERZXD]

iirc the part of Austria that he was born in was part of the Czech Republic at the time of his birth. Stop trying to be smart and actually maybe know what you're talking about before insulting people.

[@nate_meador89]

Who else is up late panicking over eoc's but don't want to look through boring notes? So you're watching crash course

[@hayleyscomet3447]

Forzalogistics45 college finals woo

[@DnC446]

This, is better than watch an hour long video from knah academy.Seriously ,i fall asleep every time watching those videos and learn nothing afterwards.

[@nacchee9096]

i had plenty times to study but instead of studying i procrastinated, and now i'm here, watching while i'm gonna have the test tomorrow

[@tacobella99]

Hana Miyamoto, same. Finals. Lol.

[@kaylivelazquez7354]

Big fan of the Biology videos, they were the reason I passed my first semester of AP Bio. You should do Algebra 2/Trig!!

[@spencerlee826]

Why did Aristotle look like a piece of broccoli?

[@suedebslavene6501]

Hank, I've been watching your videos for about 6 months now and they are so very helpful! You are adorable and funny and that really helps me learn the subject matter ; ) Thank you!!!

[@HeroDarkStorn]

Hank: Click on any of these things, that I spent non-zero time making sure work properly KZbin: Wouldn't it be fun if that didn't work anymore?

[@lovemae7540]

*_HOW DARE YOU LABEL ME BY THE PURELY SCIENTIFIC AND GENETIC FORMATION OF MY 23rd CHROMOSOME_*

[@MrRBB2012]

YOUR BRO IS JOHN GREEN?! YOUR FAMILY IS SOOOO COOL!

[@podrake8236]

You didn't know? It's literally the same channel.

[@jamalhaider6305]

WTF WHY DO YOU SHOUT

[@MrRBB2012]

Shaun Padraic Velez well i didn't 1916 win BECAUSE IT EXPRESSES MY EMOTIONS

[@podrake8236]

I Brittan OK then.

[@simakekana9965]

I Brittan My exact reaction!!!

[@allyrickert4074]

Biology test next period. Thanks :)

[@ibcnuldu]

This channel has been a major bro throughout my Chem I & Chem II class, still helping me today with Genetics. :D Thanks!

[@stephenipsen3776]

A whole new gig for the Vlog Brothers. Have conferences where you pick a family genetic trait and spend hours going over that trait.

[@TzarD369]

Indians knew of the y chromosome since ancient times we still follow the lineage system of our famous seers

[@lili011]

only Hank can sum up this topic in just one sentence. "Genetics. Resistance is futile."

[@Retterime]

Thank you for making this, I really needed it to study for my Genetics test.

[@RachelBethAhrens]

My psychology professor at community college was grossed out when she saw this video, showing it to our class. She stopped us from watching it 3 or 4 minutes in. But this is great review for genetics when we talk about how the brain works, our endocrine system, and how earwax produces body odor according to genetics and our hormones! Fascinating stuff.

[@palakmehta365]

Honestly the best channel for psychology

[@estherpixiehorse]

John Green is your brother???

[@cjhepburn7406]

Yup. Not rocket science...

[@CaseyMarkov]

@ the 0:31 mark it sounds like john is not happy and was forced into this lol

[@iluvxtra]

00:00 Heredity is the passing of genetic traits from parents to offspring. 01:26 Classical Genetics simplified: Traits are determined by genes on chromosomes. 02:41 Wet or dry earwax is determined by a single gene. 03:54 Gametes are haploid cells with one set of chromosomes. 05:17 Understanding the dominance of alleles in earwax type inheritance 06:25 Determining earwax phenotype through Punnett Square 07:27 Wet ear wax and body odor are correlated due to the same gland producing ear wax and armpit sweat. 08:47 Balding is caused by a recessive allele on the X chromosome

[@lailamohd9267]

your videos saved my life. Iv never been able to understand genetics. Thank you so much.

[@hannahcdrilon]

This really helped! Looking forward for more interesting and knowledgeable videos in the future. If only I had the time to watch every. single. one. Two thumbs up!!

[@Acedew]

yeah boye, cramming my grey matter with info before a test FTW

[@jayvrn1213]

Same

[@1david12]

+Narwhal Nachos same lol

[@nitoritou]

I'm getting this info for a project:(

[@PrivacyKingdoms]

fantastic video. but i wished he covered polygenic inheritance punnet squares

[@royandrews794]

You did not mention crossing over, the reason I mention it is because in my case this has taken place. I am Bald as are my father, my paternal grandfather and great grandfather as well as my paternal male cousins. All my relatives on my mother's side have full heads of hair. As baldness is carried on the X chromosome the only reason I can see is that a piece of X must have broken off and attached to Y.

[@BrutakasTutorials]

If the gene is carried on the X chromosome, since males don't have a second to X to counteract the recessive bald trait, that trait will always be expressed. In both males and females, both sex chromosomes have an effect on the resulting child. There's no need for a piece from the X to attach to the Y - If it's on the X, it'll be expressed. In any case, even though it isn't the answer to your situation, crossing over IS talked about in the episode on meiosis. (Ep 13)

[@royandrews794]

The reason I figured it out the way I did was because my X comes from my mother NOBODY in her family has been bald as far I can trace Yet every male in my paternal line HAS been bald since my paternal great grand father. As all the men in my paternal line must have received their X from their mothers and it is members of my paternal line , not maternal line , that are bald how could that have happened, if this gene is carried on the X, Brutaka Vex ?

[@BrutakasTutorials]

Roy Andrews Because it is guaranteed to show in men if they have the trait but NOT always show in women. Men have XY. Which means, if they get their X from their mom (which all men do, because if they got their X from their dad, they'd be a girl), and the maternal is carrying that gene, the men will be bald. However, if the women are carrying the gene in their X, that gene is recessive. So if their other X chromosome (since women are XX) has the dominant for not bald, then they wont be bald. What's most likely happening is that your maternal line has the heterozygous combination of this trait (one X has the trait, the other X has the dominant, not-bald version). However, when the next generation is being created, these women have the recessive gene hidden in there too, and so they pass that gene on to the children. In the boys, there's no X to counter it, so they end up bald. In the girl, the X passed from the dad must have been dominant, canceling out the bald X. While it's unlikely to happen so many times in a row without the mom passing a dominant trait to a son, it's at least possible. The idea that a piece breaks off the X and attaches to the Y is not only likely impossible, but would also mess A LOT of stuff up.

[@royandrews794]

Thanks Butaka Vex,but the males in my material line all have a full head of hair I know in mammalian species the male is XY (unlike avian species where the male ZZ) also X is much longer than Y that's why I thought a piece from longer, chromosome could break off and attach to the shorter chromosome, of course this could be very hard in the case linked genes that are very close (Example the gene for blue egg and pea comb, in the Aracona and Amarica breeds of chicken) I did several test crosses ( over a period of 20years) in Muscovy Ducks, Several Breeds of chickens and pigeons for sex linked phenotypic traits ( primary feather colour and feather)pattern carried on the Z chromosome of course these are all Avian species where the female ZW. Thank you for your conversation, have you any ideas that may show how .a recesive trait that normally carried on X can appear on the Y ?

[@BrutakasTutorials]

Roy Andrews It *wouldn't* show on the Y. It can't. The Y doesn't carry that allele, or a place for it.Similarly, if a trait appears on only the Y chromosome, it will never sneak onto an X chromosome, meaning that girls would never get that trait.

[@sunsetalchemy4328]

Learning things it took Professor 3 hours to teach in one video. I have quiz tomorrow, passed last exam because of these, THANK YOU!!

[@aniyaanderson3676]

the only science channel that keeps my attention while studying.

[@meredithh.garciaa]

these videos are the only damn reason I'm not failing

[@iannayoung6091]

This helps me study for my tests

[@christokelly7368]

Who’s still watching this in 2019?

[@garretiswright8532]

me

[@mademoisellenooo]

It's 2020, and I'm still here.

[@amarachiobua9055]

I just started your videos and they are really helpful... HOLD THE PHONE, your brother is JOHN GREEEEEEENEEEE I'm officially a fan of both of your work!!!!!

[@NastehaColeWorld]

Where was this when I almost died learning genetics in high school. Thank you for all these!

[@nicotean8376]

anyone in 2020? 🙋‍♂️🙋‍♀️

[@froryval8527]

Hello there

[@knoxc4248]

yesirrrr

[@cailynjordan]

yes

[@lorcanings6851]

nope

[@thecheese1860]

shut the frick up

[@PreciousRiz]

Wait what? Ive watched your videos before but John Green is your brother? Thats so cool!! Anyway, this was very helpful :) Thanks

[@patronus-ny2jz]

OMG! I HAD THE SAME REACTION! i didnt know john was his brother! IM SO HAPPY! MY FAVOURITE NERDS ARE NOW BROTHERS :') im filled with happy feels :")

[@PreciousRiz]

:)

[@PreciousRiz]

the tainted patronus hahaha ikr! :)

[@madisonc1588]

Preciousisnotsoprecious I freaked out as well TFIOS is beautiful but I never knew they were brothers (John and Hank) until I read the back of the book after watching this episode

[@m1l4n1nh3ll]

OH MY GOD I KNOW THIS IS SUPER LATE BUT IS THAT AELIN ASHRYVER GALATHYNIUS?

[@ponderingfrog]

I have to watch this video for homework, please help me understand life

[@amyblairkim6051]

Fun fact - 97% of Koreans carry the ABCC11 gene linked to dry earwax, and have no body odor as a result. For anyone visiting Korea, take deodorant with you - its remarkably expensive and hard to find as no one needs it there lol. Another fun fact - people with dry earwax use a type of small spoon to sort of scoop the dry earwax out. My husband (who is Korean) told me he never understood what Q-tips were for until he met me and saw how I was using it to get out my wet earwax lol

[@debbie7288]

My new class, Genetics recommended this video and I am glad I watched it. Thanks guys for the crash course in a challenging subject.

[@HKYDUDE]

who's watching in 2017 for science class?

[@thatonemajin3578]

me

[@abbygriffin9105]

Tyler Day Me.

[@caitlinwalls11]

Watching in 2017 to satisfy my curiosity

[@felixohrvall4791]

Tyler Day HOW DID YOU KNOW!!!

[@RohanSS]

Meh

[@siltoribio]

Hank. I think that you goofed up at 6:07 there is no way she would inherit a big W from the father because the father had dry wax so that means he is homozygous recessive (small w small w). it is a small mistake, however a viewer that does not know would probably get confused. the mom would pass the big W and dad would pass the small w

[@kariselzler3011]

I was wondering if I was the only one who noticed this.

[@marshmellowjjigae]

Not so. You incorrectly assumed that the ear with feather growing out of it has dry ears. Hank made no mention of phenotypes, only that the mother inherited traits from the grandparents.

[@siltoribio]

Draconus Nex O I see now. the shapes he added to the ears were not what was being expressed sorry. So the spiky ear is a male ear and the soft ear is female. In my opinion that is a bit confusing and not a good representation should of just stuck to pink and blue

[@getthegoods420]

siltoribio your right the only way you can have dry ear wax is if you had (ww) if he had any W he would have had wet earwax because it was the dominant allele.

[@CH-rs7cm]

does this mean I need to spray deodorant in my ears?

[@DaveBuikema]

I like this video more than the newer ones. The zoom on Hank's face and the humour seems less forced, like they spent a few days casually writing the script and threw in things that were actually funny

[@kristin62796]

hi hank! crash course videos are very helpful for refreshing understanding of material - but I'm never really sure if I remember it. it would be really helpful if at the end of videos there was a short quiz to test understanding/memory of the material. just a suggestion. thanks for all the help!

[@ayeshakhan1613]

today years old when i found out this his brother is JOHN GREEN ???

[@letamcmillen7768]

My science teacher had us watch this in class

[@sahanagupta2122]

Follow me back

[@brianmerdani673]

Bio test next period, pray for me🙌🏻

[@themagicconch2852]

How did your test go?

[@jvp6302]

Good job! That was very instructive. Thank you guys

[@tijanaz2119]

You guys are really helping me with my AP Psychology, thank you!