Dihybrid and Two-Trait Crosses

[@AmoebaSisters]

Card Note: At 4:50, we made a card edit that this example is a "test cross" two-trait cross as to be a true dihybrid cross, both parents should be heterozygotes. However, *the steps to solve two-trait crosses are the same* whether the two-trait cross is is a true dihybrid cross (meaning 2 heterozygote parents). See our handout for a true dihybrid cross with two heterozygous parents: www.amoebasisters.com/handouts.html We appreciate an email we received about this topic- thank you! :D If we redo this older video, we will make a point to specify the differences.

[@squareball7017]

I dont quite understand 5:50 where all letters in the side are in lowercase. Could you please elaborate more on the idea? And if so, are there cases where there are uppercase and lowercase letters in the side? Because in a 2x2 punnett square, the sides' are usually different, for instance an 'S' and 's' combo, so why doesn't it apply in a 4x4 or more?

[@judecaruso434]

what

[@miracaaahalane]

:D

[@leawilkinson6792]

so do dihybrid crosses provide support for dependent inheritance?

[@lauragordon6414]

When will everyone else realize the old saying? "Explain it to me as if I were a child!" Thank you, Amoeba Sisters!! :)

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*ELI5* Explain Like I'm 5

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fail

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I do my quiz in the Dec 5 2019

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The Elder Gods.

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same for in-class bio

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LITERALLY

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[@eduardomata917]

Facts

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Me

[@maiafuller249]

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[@SimplyCorbin]

Yep

[@ezraagi392]

You explained this better in 8 minutes than my biology teacher in 50 minutes. Thanks a lot!❤

[@crowteeth7773]

MY COLLEGE TEACHER DIRECTED MY CLASS TO THIS VIDEO. AMOEBA SISTERS FOREVER 💪🏻🙏🏻

[@Wesley-he9bz]

I’m in 9th and have to watch this

[@mistysmith8469]

I have been watching these videos as a refresher for part of studying for my state exam for teaching science. Thank you guys.

[@AmoebaSisters]

+Misty Smith So glad to be a part of your studying---wishing you a wonderful career as a science educator!

[@1234-m3n]

Thanks for carrying me through Bio, I love you guys.

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Same! Doing that right now for secondary biology in NM!

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how’s teaching going

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Were u prepared for that biology test 5 years ago?

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@@reginadoyle3770 Here for a biology midterm tomorrow, I'll let u know how I did.

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How’d u do on ur biology test? Loll

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@@scoutmaster6490how did it go?

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I am taking bio this year, and we watch Amoeba Sisters videos all the time! They are so funny and so informative. Thank you both so much, I know a lot of hard work must go into making these. Just know that your hard work really helps people!

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Lexi Battaglia p

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u still alive?

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Omg your video was so much easier to understand with cats and sinks than all the other nerdy scientific videos I tried, thanks so much!

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hi

[@tsmit0929]

9 years later and you're saving my college life.

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My 8th grade science teacher is showing us these videos in class, and they are actually very helpful! While having fun animations and concepts, they are quite dense with information. Keep it up!

[@user-rl5ph2hr1i]

Is it Ms. Vazquez?

[@AyeshaKhan-gp9on]

The FOIL method you explained for the gametes? Now I'm never ever messing up my dihybrid crosses!! Seriously, you guys are the best!!

[@dldudasik]

I'm a teacher - a don't really understand science teacher... this helped me so much, and I plan to show it to my student tomorrow. Thank you - and say hi to Moo

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u shouldnt be a teacher

[@YonikMalik]

don2killu why Mr. Cringe?

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@@YonikMalik because it's such simple concepts.... Really shouldn't be a science teacher if you can't even understand hybridization without looking up a KZbin video

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noice

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I don't know how people passed biology before Amoeba Sisters existed 🙌🏻

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no one chose to be here

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in all honesty I did choose to be here because I never learned these but they're for homework, so now I'm up at 9 looking up amoeba sister dihybrid punnet squares 😭

[@fatmahmojhanyadatu-dacula2220]

Its 5 30 in the morning and class starts at 6 but im still at home watching this😓

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when you understand a full concept in an 8 minute video instead of an hour long lecture

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Thank you, my teacher didnt have time to go over dihybrid crossess, so when it same to my homework, I came to you, and you really helped me =)

[@richardsarkees7682]

felt this.

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My teacher uses these videos in class.

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Space Doggo same tho

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I think its fine if they do that as an introduction, but not base their whole lesson around it

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same

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Same

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The Naruto dog reminds me of Squanchy. Thank me ltr...

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dude i hate these videos so much but they are so good they help me so much thank you

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I can't explain how much I love these videos. I struggle with science but it's so much easier to understand with cute videos and handouts.

[@juniorpinedo2812]

Thank you so much for this video. I am currently studying for genetics and my professor does not know how to explain well these concepts in class. She uses horrible analogies that she thinks works. This less than 10 minute video has helped me more than a $120 textbook she wants us to buy. Thank you so much.

[@briannadijonay]

Thank you!!! I got a 90 on my monohybrid/dihybrid test.... great video :)

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omg yay it finally made sense! I literally just skim through my textbook and then actually learn it by watching your videos. They are so cute and funny, and so so easy to understand! Tysm, you're a lifesaver!

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Greatest channel of all time. You clutch up for my tests

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You're videos are saving my scores in Biology! Hope you still make videos! Can you make a video about the Mendel's Laws of Inheritance? Thank you!

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i went to catsandsinks and now the fbi wants to know my location...

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wait literally?

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@@UnmodernDaughteroftheKing yeah the fbi want to pay him a visit because he searched up catsandsinks

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final year of college and i'm here, never been more grateful haha

[@michelleroberts6597]

wow, thank you SO much for the video. I'm now confident in making dihybrid punnett squares. I was just bored, and I was thinking about a genetics question while watching tv. every once in a while in my advanced age - lol, I think about these things. anyways, I'd realized that I'd forgotten how to do punnett squares for dihybrid-type problems. thank you once again. you guys are great at making these. I'll have to subscribe now 🌞🌞🌞

[@chloee_bean]

I loved this soooo much!! You managed to make it informative and understandable while still making the process enjoyable. Thank you sooo much!

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MY CLASS AND I ARE LITERALLY OBSESSED WITH YOUR VIDEOS! MY TEACHER ALWAYS ASSIGNS THESE VIDEOS FOR OUR HOMEWORK BECAUSE THEY ACTUALLY EXPLAIN STUFF! I had a 94% in science and now I have a 98% thanks soooo much!!!!

[@farmatt6737]

According to the pet food company Candidae, cats enjoy the cold, hard basin of a sink because it helps them cool off. If it's warm outside or if you have the heater on inside, your pet may see your sink as a nice respite from the heat.

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i have been strugling for three hours not even chatgpt could explain this to me y, you saved my college life

[@alyssajunee]

I'm taking an online course biology, right now, we're learning about Punnett Squares and Dihybrids and things like that. This video helped me understand it sooooo much better than the information that I was reading. It never explained exactly what gametes were and to freaking foil the letters. Plus it was using cats as examples and I love cats! This was awesome! :D (ps, my cat lovessss our sink also!)

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Never stop making videos 😭

[@zaiaisastay9421]

Thank you! I am beyond grateful. This has helped me a lot. I was confused about dihybrid crossing before watching, and now I feel enlightened. Thanks!

[@mahekm6977]

I love your videos...Please continue your work..You hav helped me soo much...your videos are intresting and they make even the worst topics intresting..😍😍

[@AmoebaSisters]

Thank you for the encouragement!! It helps keep us motivated!

[@faeryb0mb]

moo looks very smart. ((i know from having smart cats. one of them can almost use a doorknob. not joking))

[@moniquereed3294]

By definition, a dihybrid cross is between two individuals both heterozygous for two traits and produces the 9:3:3:1 ratio. In this example, one parent is homozygous for both traits. The example here is essentially a backcross, the crossing of a hybrid individual with one of its homozygous parents. But it is still a good example of how to do a two-trait cross.

[@carolinemcdougall2543]

Massive thankyou to you, I watched this video last night, the night before my exam. :/ and it came up. Chuffed to pieces, never thought i would be so happy to create a dihybrid punnet square. lol.

[@AmoebaSisters]

Caroline Mcdougall Thank you so much, Caroline! So glad to hear that :D

[@katedufall6745]

I absolutely positively love that you use cats as the example, it makes it so simple! my cat enjoys winter here in Australia because she can go outside and play in the puddles, with all the cows looking on. its hilarious.my cat also enjoys sleeping in the bathroom sink at night.

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Hey there again! Its me Bharath! Once again you have helped me on my journey to my dreams! Thank you!

[@AmoebaSisters]

Bharath Sri Thank you so much, Bharath! :D

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Made a dry topic relatable and engaging so that I actually wanted to follow. Refreshing, relatable, uplifting, and informative--thanks!!

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The phrase "Throw everthing but the kitchen sink" suprisingly came from a pair of roomates who had a tarantula in their house but were too scared to touch it. They wound up deciding to throw something at it too crush it but weren't very good and had ran out of sensible things to throw. When one roomate asked the other what to throw next, he glanced over at the kitchen sink and saw his cat resting in the sink and said, "everything but the kitchen sink." They eventually killed it with a vase and the repairs and replacements for the objects in thier living room only costed them 3,000. The roomates made an inside joke of the phrase and it grew from there to common use. Except I made all of that up.

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The whole cat skit made me laugh really hard

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i did not know I needed to learn these lessons like a child, school books are boring this video is better thank you I was about to fail but I found this and I understood it better and I might pass

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This has literally been my Biology haven

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[@marimbn2967]

God bless you...The dihybrid cross was messing with my head but now everything is clarified. thank you so much😇🥰

[@emilymarierobertson]

I’ve been trying to figure out how to set up the squares for an hour, and just because of the foil method I got it in 5 minutes. Crazy

[@smm3na]

That 'cat loving sink' thing and parents of moo (Mr.&Mrs.mooington) was ridiculous !!! 😂❤😻LOL

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[@ryan-fq7ob]

learning to foil the night before my biology quiz. wish me luck...

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The edpuzzle doesn't have closed captions so now I'm here lmfao

[@Dmorales777]

I don't ever comment on videos but this helped tremendously with my Bio assignment. Thank you.

[@bebyyoda]

my teacher sucks at explaining things so she sends this video

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wow! that's really bad. she shouldn't be offloading her duties as a teacher. but then again, it's actually a good idea because the more things you have to understand a difficult concept, the better 🌞

[@travisgarcia7705]

Professor Mooington is the best!

[@joliepinsonneault8305]

the first question: have you ever been working on a Punnett square and you think man I wish there weren't only these four squares? Me : have you ever been working on a Punnett square and you think , man, this is so stupid.

[@ansleyb1481]

I thought my computer broke because I was scrolling so long lol

[@TheRatDoesArt]

I love that Moo’s eyes are going to different directions.

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Mannn we haven't even tackled this lesson but we have to answer the tests already 😭 thankk youu this is a blessing ✨

[@Rai225T]

Thank you! I often forget the FOIL method❤

[@reg456n]

Your videos on genetics inheritance really helped me in my exams (MMD!!!) thank you so much.

[@foolnessg4236]

The main thing I learned is that I should look out for Cats in Sinks. Incredibly Valuable Lesson, 10/10.

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The amoeba sisters are the answer to all my problems.

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My Biology class loves watching your videos. They are always so awesome. By the way I think my cat is HhSs because she LOVES the sink too.

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having a bad bio teacher that has to cram 4 units into 3 weeks in order for us to cover all units on a final and your turning to the Ameoba sisters so you can actually pass the class checccccck

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i have a midterm in just an hour, wish me luck

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Did you do well?

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Sending you my energy

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Amoeba sister's... you are the best! I wish you taught every subject I was taking

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I love your page, and have learned so much for Bio. The humor, jazzy music and simple detail are what I love most.

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These videos always help me so much in biology! Thanks for making these :)

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I got the highest grade on everything in my exam, except.... this. I genuinely failed this part and now need to redo it as a complementary test lol. Thanks for this video!!

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My alevel exams are saved! Here’s to last minute refreshers. Thumbs up if you’ve got your second biology paper tomorrow

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1:35 it’s called: I fits I sits

[@dustin6137]

Can u please make more science videos! This helps with my home work and my sciende class. Thanks

[@raenydays]

I've never wish for more squares, I can't even solve 4 squares

[@griffingaming3279]

Thank youuu. Now i can finish my Homework. Keep up your videos

[@k0naOK]

THANK YOU I FINALLY UNDERSTAND!! I feel more confident for the test in 5 minutes now... 😅

[@ENB1968]

Recommendation is to avoid using letters where the upper- and lower-case versions are pretty much the same. Here are some letters I like to use: A/a, B/b, D/d, E/e, F/f, G/g, H/h, J/j, N/n, Q/q, R/r, T/t, Y/y. These...not so much: C/c, I/i (except for blood group alleles "I^B", etc.), K/k, L/l (could be a upper-case "i"), M/m, O/o, P/p, S/s, U/u, V/v, W/w, X/x (used for X chromosome), Z/z.

[@abigaylelumley]

when a youtube video explains it better then your biology teacher 🥸

[@scholar_lami]

Hi! You video is amazing, however I do have a quick question; how do I know that the ratio for the dihybrid cross is 1:1:1:1? Shouldn't it be 4:4:4:4? Why so?

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Our biology teacher teaches us with ur videos, we are the gate class, the elites

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Who else is here because they have a test tomorrow or today?

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Now rn at this moment

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Welp, today IS my lucky day, because I freaking LOVE BIOLOGY. A little while back, my class was making a concept map on a whiteboard for cells, and I pissed off the class by taking up most of the period (And the Whiteboard) because I wouldn't shut up, and I'm still mad because we missed a bunch of them because the bell rang.

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This video was really good helpful thank you so much!!! I was having trouble on my genetics packet and this just explained it perfectly and also in a fun way so I was able to pay attention🤗💙

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Easy to understand with this channel

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