Punnett square fun | Biomolecules | MCAT | Khan Academy
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- เผยแพร่เมื่อ 3 ธ.ค. 2024
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Dihybrid crosses. Independent assortment. Incomplete dominance. Codominance and multiple alleles. Created by Sal Khan.
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To everyone out there complaining about Sal not knowing the origin of the term Punnet. You have to understand that this is not the only area of knowledge Sal teaches about. If he was exclusively a biology teacher than it would be strange but he teaches a multitude of subjects, such as Math, physics, chemistry, economy, and so on. Give the man a break. Also, it's not like it's something that is critical for you to know since pretty much nothing is dependent on its knowledge.
Sal is the best
Yes, but he calls his mistake "the biggest takeaway from this video" 0:20
@@brettbrzycki6845, He needs to do a video on sarcasm, apparently. :)
True words have never been spoken before
I'm very happy that people like him does exist. I'm not English native speaker and those videos really help me a lot. I can learn another language at the same time I'm learning Biology, History, Mathematics, etc. So awesome! Thanks internet. I'm really living a gold era.
That’s not a language
Those are not languages my guy what u talking about
@@johnathanvazquez3069 He is understanding english while learning biology, math, and etc.
i hope this guy goes strait to heaven he is a present day saint
Why
No he’s not
@@johnathanvazquez3069 yeah
FML! I've been lost for the past two weeks in class, and now you saved me just before my quiz tomorrow!! God Bless you Sal!
Nash Reed this was 7 years ago but today he’s helping me for my test tomorrow
can we talk about how great sal is good at explaining science and math, he makes me like science a lot more there hasn't been one video that I've didn't like.
"THE YELLOW TEETH....or, no...maybe that's an environmental factor."
that had me laughing for days!
Thank you soooo much. I have a psycho instructor who handed out several pages full of punnet squares to a completely uninitiated class, with no explanation whatsoever!!! Thank God for TH-cam.
These videos along with others are part of my daily morning ritual. I love TH-cam for all of the amazing minds sharing knowledge in their unique ways.
Reginald C. Punnet invented the Punnet Square and why the baskets are called punnets is because he was a farmer and bred Chicken famously the Crème Legbar. Punnet for a basket is slang in the farmers market scene
Okay, so a quick Google search reveals that yes, Reginald Punnett developed the square, and was a famous biologist...but the word Punnet (with one t) is indeed a wire basket. My question is: these two things seem to be related, grids within a box, so do they call the baskets after the scientist, did the scientist see the similarity in his name and apply it to his work, or (And this is the one I'm leaning to) were aliens involved?
They aren't related lol
@@khallelakatrinabarracks7823 christ, that was back in my college days...before the dark times, before the military!
a very good lecture, i just had a lecture at college today and came out with nothing but i knew exactly where to go on you tube!!! You explain so easy for everyone's understanding and we praise God for giving us you!!!!!!God Bless You!!
Cannot thank you enough- love the vitality you contribute to you're videos! Its great to learn from someone who is actually enthusiastic and passionate towards their teaching- unlike a lot of school teachers!!! PS you make everything seem so easy which a lot of teachers fail to do!
You definitely make things so much easier to grasp. Amazing work!
Are you the light I am seeing right now??!
I failed this part of bio cus i slept the whole week. Thank God I saw this before exams LOL.
U sleeping now?
Punnett (Reginald)=squares, punnet (thing)=basket. Spelling does matter ;-) But the basket does look like the grid so it's easy to make the assumption. It got a lot of us to look it up. Personally, I'm fine with either explantion (ha) because I FINALLY get alleles, genotypes and phenotypes. Thanks, Sal, you did it again!
He is awesome. He helped me get an A on my test. So.....Thank you sir.
Fuck lucky fellow
What subject
@@jacquelynnrutti6705 phys ed
This really help my son get ready for his quiz! Thank you Khan Academy!
teachers love this guy. I use his videos in my class all the time.
Reginald Crundall Punnett FRS (20 June 1875 - 3 January 1967) was a British geneticist who co-founded, with William Bateson, the Journal of Genetics in 1910. Punnett is probably best remembered today as the creator of the Punnett square, a tool still used by biologists to predict the probability of possible genotypes of offspring. There is where the Punnett came from.
"Power of the Punnet Square"
Hey! Thanks for letting me know about the punnett basket stuff... now I have smthin to share with my class...
notice how he always resays a word if its not on the paper when he says it!! dudes beastly smart [=
how many hours of studying this and in 17 plus minutes i actually get it now bravo!!
u 26 now bro?
This helped me last minute for an exam without studying. Many thanks
Hey it’s been 9 years! How did your exam go :)
I am now a teacher :-)
@@dumfries359 wow that’s so awesome!!! What do you teach? :)
@@xuanchange biology 🧪
I honestly just want to say thank you for making these videos. They have really helped me in a lot of my classes. I always watch your videos first before I watch any one else's on youtube because you do the best in laying the foundation for learning more about a subject. Really, thanks.
👍 @Chi6692 *
If Mr. Khan has made a bad video, I haven't seen it. Thank you so much, this helps more than I can express with mere words.
For UK syllabus students: 'Incomplete Dominance' is also called Co-Dominance.
Very important NOTE: In the flower example, RW genotype gives rise to a 'Pink' phenotype. This DOES NOT mean a new pink pigment is formed. It means that both the red pigments and white pigments are present. They are co-dominating. So it appears pink.
The degree of how much red-er or white-er it may appear can be studied in advanced genetics.
No, incomplete dominance is when the alleles are mixed in the phenotype and co dominance is when both alleles are seen separately.
So if a red flower and a white flower were crossed, co dom would make the offspring red and white, incomplete dom would make the offspring look pink
@jread09 You shouldn't judge a video unless you watch the ENTIRE video. So what he goes a little off topic. He's a lot better than most teachers/professors you'd find in a college/university/school.
The "Super Punnet Square" really helped! Thanks!
Wait I actually got A+ in my long test you are really the light and saviour
In God we trust, but other people have KhanAcademy
you are saving my BIO 101 grade, thanks
wow thankyou so much for all of your videos they have really helped me and this one just helped me with my test tomorrow XD thx a bunch!
Hey it’s been 12 years I don’t know if you still use TH-cam, how was ur test?
I had no idea how the punnet square worked before this, and now I feel very confident on how to use one. Excellent explanation!
Actually, Reginald C. Punett developed this method, that's where the name came from--Punett square.
Anyway! love from India.
21:01 *Relates his time lapse to a cooking show* Me: Oh thanks, he saved me time and I got a joke
Wow I was a bit fuzzy on all this but you really helped me! I love you Kahn you help me pass school. And when I read your name I think of star trek so I always get a bit of a chuckle.
Thank you so much! you have an excellent way to explain the material in a form to be able to understand it...excellent!!
6:51 "you have 1/4 possibility of being white" :)
You Sir Are Amazing. I Dont Know How I Would Pass Without You. You Truely Are The Ultimate Mentor.
this guy has saved my butt WAYYYY more the once lol, it gave me the extra umph for passing my tests thanks a whole bunch!!!
best youtuber ever
to everone who dosent knoe just go to this youtuber
OMG thank you. you just hepled me understand how to do it and now i am ready for the finals :D
Hey! It’s been 9 years. If you still use TH-cam and remember, how did your finals go? :)
You’re a Legend, Sal.
thankyou so much for all your videos! i like biology but some of the topics i don't really understand and my teacher kinda fails at explaining sometimes. i'm really grateful you have these videos because they help me a lot! thankyou again!! :)
Im doing all of this high school and college stuff in middle school and bro you have really helped me and i am amazed by your skill i wish you were my teacher
It's not because of those strawberry boxes , it's called a Punnett square
Punnett was a scientist who contributed to genetics and talked about mimicry in butterflies. That's the reason for it to be called a Punnett square..
Hey, first of all thank you so much for all your help! High school does not cover this much detail (have no clue why) but I also had a question as to the blending of the genotypes in the plants to form pink. You said that RW can blend, but does it necessarily blend or can RW result in Red petals? If this is the case wouldn't the probability of a phenotype increase to 6 (denominator) instead of 4, since now there are an additional 2 combinations (blending) in addition to the primary dominant red?
Thank you very much. I watched the whole thing, it really helped.
wow how do you noe so much physics, engineering, bio, economics math ??? legend!!!
Can you make these videos downloadable? It would be very practical for mobile viewing when data is not available. These videos are included in my courses so when travelling it would be great to be able to view them on my S3
Sal knows everything lol
Tienkhoa Pham lol he does
right? hes everywhere
Awesome! Thanks for video
Thank you sir for all your videos. They have helped me a lot. I learn by visuals and not so good in lecture. This is great!!
Ive been having trouble with this but the way you expalin it i totally understand =)
Thanks a lot . Your videos are really helpful because I actually learn something here and it develops interest too.
Thankyou so much! Really appreciate your videos :)
Your videos really help me out each time, really helpful and impressive!
I love your explanation. It's easy to understand.
Wow your lectures are amazing keep up may god bless you
Much respect my friend. Love the vids.
holy crap dude u blew my mind at the last one u have my subscription :]
hey sal, you are an awesome teacher, and hats off to u for ur initiative for free education to all..
PS: Punnet square is named after its developer C. punnet!
Sal, you're awesome and I appreciate all the work you put into these videos. I just wanted to point out the error in your incomplete dominance example. The parental generation couldn't be red and white with the genotype RW, because their phenotype would be pink!
well, isn't that what he's explaining? he calls it blending and two out of 4 become pink.
in sophmore year of college...and i finally get this..thank you khan
This is where the name Punnett came from. LOL
Reginald Punnett British geneticist
Reginald Crundall Punnett FRS was a British geneticist who co-founded, with William Bateson, the Journal of Genetics in 1910
Thanks for helping me very nice vid keep it up better than my teacher🙃🙃
You are recording this on a tablet. I'm impressed
This could be a start towards online schooling! XP
2020 be like
this helped me so much, omg. Thank you so much!
Thanks so much. This is making it easier for me to study
I pretend I'm in class when I'm watching your videos because I wish you were my teacher tbh.
Same
purrsiantea while in class lol that's funny ASF
Huge thanks to you man
Wish you were my professor !!!! AMAZING
I'm English, and yes, I can confirm we call vegetable or fruit baskets punnetts.
I expect Gregor Mendel had punnetts around when doing his experiments.
punnett square "fun" lol there are many ways to describe punnett squares but i wouldn't call them fun! great video :D
LOL at the "Yellow teeth"
Sal, what is your recording set-up? I'm just curious how you record your videos!
Thank you very much for this!
You're insane bro! Too good.
ACTUALLY...
Punnett:
1) The little green baskets they use to sell Reginald Punnett's (& others') DNA-containing soft tissue at the Farmers' Market, &
2) Whatcher Gran sez when you are punning too cheekily, typically just before she cuffs you for same. A contraction of "pun, innit" (innit being itself a contraction).
FYI the term Punnett was used in Punnett square becuase off Reginald C. Punnett who worked with genes. Its not becuase of little green baskets. Just thought I could help clear that up. Enjoed the video.
i really like this keep up the good work!
Dats a great job done sir
you made me to love biology sir
I LOVE THESE VIDEOS!!!
THANK YOU!!!
You are amazing ! thank you!
Thank you this helped me
u r an inspiration. kbye
Actually they are called Punnett squares not because they are related to baskets in a farm or stuff...
They are named after the British professor who invented the punnett square,
Professor Reginald C. Punnett...
The punnet square was developed by R.C. Punnet
HUGE THANKS!!!!!!!!!!!!!
6:51
they are called punnet squares because of the guy who invented them... Reginald C. Punnet. Just thought i would let you know.
Thank you so much !!!
thx u helped me understand it!!!!!!!!!!!!!!!!!!
Wow..you are awesome! And yes here in England, we buy strawberries by the punnet.
thanks man you are awesome
omg this video was uploaded on my bday
Woah omg. That's the most amazing thing I've heard, like, ever. Holy crap. Much amazed.
-_-