Dihybrid and Two-Trait Crosses

This video will show how to set up and solve everyone's favorite 16 square Punnett square. Example solves a two trait (two factor) test cross which can then be useful for solving a dihybrid cross on our handout here: www.amoebasiste... This video uses vocabulary that was previously defined in the Amoeba Sisters Monohybrid Crosses video.
The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching biology at the high school level. For more information about The Amoeba Sisters, visit: www.amoebasiste...
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[@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?

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what

[@miracaaahalane]

:D

[@leawilkinson6792]

so do dihybrid crosses provide support for dependent inheritance?

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I do my quiz in the Dec 5 2019

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

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

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

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Facts

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[@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 🌞🌞🌞

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My teacher uses these videos in class.

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[@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!

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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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u shouldnt be a teacher

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don2killu why Mr. Cringe?

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noice

[@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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What's up honors bio students

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

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

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Thank you so much for creating this video all my worries and questions are finally gone because of this video. 💜

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1:35 it’s called: I fits I sits

[@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.

[@farmatt6737]

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[@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

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

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Bharath Sri Thank you so much, Bharath! :D

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

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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 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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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

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

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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.

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

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Did you do well?

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

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thnx a lot..i nevee understood punnet sqaure but now i do!!thnx

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In lines with my lessons in the class❤❤

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Thank you! ❤