Pedigrees | Classical genetics | High school biology | Khan Academy

[@jaredackley7997]

who else has an exam in an hour and is cramming

[@uduakntuenstv9629]

Jared Ackley same here

[@twitchopasteee3809]

Jared Ackley 10 minutes

[@lopstersharks9385]

Tomorrow

[@Alexlabtester]

Yes

[@connormitchell9220]

Year 10 exam in 2 hours, this shits so hard

[@ItsKruski]

I love his hand writing and voice... perfect

[@emmanuel_toowavy8282]

This 6 minutes video Taught me well more than what my biology teacher would do in 3 hours 😬

[@pyxidis1632]

6 minutes taught me more than my biology teacher has in 90 minutes

[@dannnxo]

Fr you aint even lying

[@kivan6657]

no cap brother

[@rachelnazario2181]

Frrrrr

[@jareth3387]

Fr

[@meileytat]

HELP SAME

[@xoxoali9070]

procrastination at its finest

[@IndigoShade]

why you gotta call me out like that

[@reggiewastler7305]

How did you know

[@papupradhan9920]

I want more on PEDIGREES

[@BobsBites]

At first I thought it is pedigree for DOG FOOD, but now I know its a lesson.

[@theorange8755]

😂😂😂😂😂

[@thespectator700]

lol

[@lumiere3711]

I thought so too but when my prof introduced the lesson I was like why is there circles and squares xD

[@legendsthatlast1510]

God bless you! I could never understand it but you broke this down so well compared to my college textbooks! We do not even currently have a lecture! Taking Biology online was a mistake on my part!

[@jazzylovesth]

thank you so much! i'm working on homework right now and you explained it very clearly, well done!

[@Starrymoon_star]

A 6 min vid explained better than my math teacher in 1 hour thank you so much sir I wish my teacehr was like you much loves and thanks!!🎀🎀🎀

[@y0utube129]

this helped me in 10 mins instead of lectures for 90 mins

[@shiveshsatyakam7468]

Bhai bahut aacha bataye hain i clear my concept from 0 to1

[@sobiakhurram4955]

Mr. Khan you're awesome

[@iloveyunseomuch]

thank you this explained it so well

[@gu5ie674]

this was amazing thankyou!

[@shagganuereeves158]

Appreciate this man for teaching us

[@beepyho]

Thank you.I'm really sure that I am good enough thanks to you.

[@beepyho]

Good

[@beepyho]

Great

[@shubhchoksi2346]

this helped me so much thank you

[@bobbywang9223]

Thanks for the video 👍

[@backstreetfan2887]

I just love hearing Sal teach keep up the good work thank you for all you do

[@njlaotb3102]

Thanks ❤️

[@AnnikaBai]

Can you tell that freckles is autosomal dominant just be looking at the pedigree?

[@biochemfusion]

Outstanding sir

[@kundana2005]

Amazing video, thank you very much!

[@slimtuleii]

Thank you so much

[@xdrenteria4124]

Our teacher made us watch this.

[@itzjoemama_]

same

[@koni6836]

Same

[@Veron68778]

Same

[@kristallynn1755]

thank you🙏🏼🙏🏼🙏🏼

[@757_girlt5]

Thank u

[@fl24476]

Maybe someone can answer this question: But then how do you determine whether a trait dominant or recessive and if it’s autosomal or sex-linked?

[@VaakOfKhorri]

01:40 thats what schools dont teach us

[@princeicio]

If both parents are affected by a certain trait, does that mean they're gonna pass on that particular trait to all of their children?

[@kjhuncho4631]

if its recessive , the children might be unaffected

[@BHOSADIWALLA-o6r]

It depends if the parents' trait is heterozygous or not, i.e. if the genotype for the trait is heterozygous then there will be a certain probability wether or not the trait is passed on or not

[@cakey1668]

I think the answer is it depends. I will define 'passing on that particular triat' as 'having same phenotype as parents'. If the alelle linking to the trait is autosomal recessive, then yes. If the alelle is autosomal dominant: -If at least one parent is homozygous dominant then yes. -Otheriwise there is a 25% chance that the children have different phenotype than their parents. If the alelle is X-linked and dominant: -If the mother is homozygous, then yes. -Otherwise, all female offsprings will have the same trait as their parents. There is a 50% chance for male offsprings to not express the trait. (75% chance for trait to pass on to children) If the alelle is X-linked and recessive, then yes. The alelle cannot be Y-linked since the trait affects both parents. Please let me know if I'm wrong. I know I'm five years late but I just want to answer it

[@princeicio]

@@cakey1668 I don't know much about biology or genetics, but thanks for taking the time to enlighten me

[@cakey1668]

@@princeicioI'm glad to be of help!

[@jookie4207]

Yes, but how can you tell whether the pedigree displays a dominant or recessive allele? You just gave us the answer that it’s dominant but didn’t tell us how.

[@selenite3890]

it's hard to explain, but you look at the ones that are colored in. generally if there are more that aren't colored in its recessive, but that's not always the case. here, you can tell because the only family where none of the children have freckles is the one where the first generation's daughter doesn't have freckles and in everyone else, freckles are more common.

[@sukshasakura4997]

Isn’t because there isn’t carrier ? It’s either affect or unaffected in the dominant while it can be affected, unaffected, and carrier in the Recessive

[@frankcao7727]

thanks

[@foopgallery]

You're a god

[@appreciantinx4214]

Pedigree sounds like the dog food

[@kerbygalang4509]

looks familiar huh, then u a dog?

[@Ahmed-bb4yp]

How were you able to tell that they are autosomal dominant, and not autosomal recessive?

[@EdmundDerwent]

It is given in the question/statement for the pedigree. You shouldn't be asked to work this out in the question.

[@PinkamyElectricwala]

That's cause ALL the generations are affected as in if u see an affected individual and then look up to their pedigree the parents are affected so it's a dominant trait

[@taylornewton5988]

@@PinkamyElectricwala This pedigree could be showing either a recessive disorder OR a dominant disorder based on my worked solutions? For the disease to be recessive the genotypes of generation 1 would be switched with the female being homozygous recessive and the male being heterozygous resulting in a 50% chance of offspring containing the trait. Every affected person would be homozygous recessive and each non affected would be heterozygous (except for II-1 which could be homozygous doinant or heterozygous)

[@amerakkari4617]

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[@hatichestrange8368]

good

[@sciencenerd7639]

Very helpful, thanks so much

[@ccvvs]

for generation 1, how do you know that the male if ff? What if they have the recessive gene of freckles but doesnt appear on their physical appearance

[@ccvvs]

is*

[@ShiannaFury]

Freckles are a dominant gene, so they’ll always show up whether it’s FF or Ff. The male doesn’t have freckles, so he is homozygous recessive!

[@GamererrReal]

did he say anything about partly filled in shapes?

[@maybe_magic_bird4617]

Partly filled in is a carrier

[@oldandwesternreviews2823]

Pedigree analysis

[@beamyopinta7893]

It's just uploaded after I took Biology exam =-=

[@namitapanda3092]

Lolol

[@prankie727]

How u decided having frekel is dominanat

[@emma-z]

GOOGLE

[@agerncygumbo2419]

finally get it

[@massive218]

pedicure

[@srisankalpamishra3006]

Nice!

[@jbcloak1458]

Keep your comments to yourself I’m trying to learn

[@srisankalpamishra3006]

@@jbcloak1458 😅When did I reply to you either😆

[@pravdahoff1202]

@@srisankalpamishra3006 Vik is that you

[@srisankalpamishra3006]

@@pravdahoff1202 What does that mean?

[@pravdahoff1202]

@@srisankalpamishra3006 Joe Mama Bruh Sleath 100 Lmao 🤣you 😂🤣

[@kramchancel1266]

bro you guys deserve a Nobel prize

[@biochemfusion]

I've a confusion about offsprings? In this case you've shown 3 offsprings in 1st generation, maximum how many offsprings we can draw???? How to know how many children would be effected and how many would be normal??? Please do react

[@bryanfrausto3642]

Blue face baby

[@Nickiisqueenofrap]

Yea aight I'm every woman's fantasies

[@KhoiTTA]

Bryan Frausto bust down thotiana

[@bryanfrausto3642]

Momma always told me I was going to break hearts stupid don be mad at me

[@leslynbriones6946]

what is teh other genotypes for their offsprings?

[@sherwinthirumavalan2477]

hey

[@sangita182]

Just Waoooo❤️❤️❤️❤️❤️

[@mengenliu3258]

Isnt this also autosomal recessive

[@Kryshma]

I think this is an autosomal recessive because the fact that in the 2nd generation is Aa in female and aa in male, the 3rd generation should produce atleast one heterozygous offspring. Correct me if I'm wrong.

[@wumboshorts]

@@Kryshmai went straight to the comments because i thought the same thing-i think it can be either 😂

[@LiaSueKim]

is it medicine or biology ?

[@KeiW_]

I learned this in Biology

[@LiaSueKim]

which grade? or college?

[@papupradhan9920]

It is modern Genetics

[@LiaSueKim]

i asked about level

[@KeiW_]

10th Grade Biology Honors

[@_itsjustcat]

What if both parents show the trait but not all of their offspring show the trait??? Would both of the parents genotypes still be Ff?

[@الوردةالبيضاء-ف3ع6ت]

When are you going to put a translation into the Arabic language in your videos

[@ItsKruski]

but if you can speak English why have it in Arabic I understand that the majority could also need it in Arabic

[@jonno9412]

Battlepass

[@biochemfusion]

Please sir 🙏🙏

[@austincornelius3172]

who else is currently at an exam and cramming

[@naysathomas1442]

can you do a video on sex linked disorders

[@samranhaider4815]

Presentation

[@wagishasharma2852]

What I didn't got in weeks....that I got in just minutes....

[@BlackopsUSN]

I am here because my college professor for bio is terrible

[@fikerabigia]

ion get it

[@xlemzy]

Ah, virtual school

[@ash-eu3ex]

pls tell me what to put in the exam lol i'm dying i've been watcjing this for 30mins and don't even understand a single sh*t

[@wildernesstv4210]

It’s funny because I have to learn this in 8th grade

[@Ryan-fi2ul]

neglected to communicate there is a Y chromosome on the males

[@tomxd7660]

That’s only relevant when talking about sex-linked inheritance

[@trickyok5101]

Final exam in 30 minutes

[@icampinbushes3672]

Who else in Mr.Mclin watching this

[@kapilsharma-ju3th]

Ghanta kuch samajh nahi aaya