Dominance & segregation laws | Heredity & Evolution | Biology | Khan Academy
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- Опубліковано 26 лип 2019
- Let's learn Mendel's law of dominance & segregation
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Created by Mahesh Shenoy
This just calls my education fees a joke.
? I didn't understand
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Nope
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@@hansvonmeinstien3660 who asked?
📌• Dominant traits are the traits which express themselves in the generation WHEREAS Recessive traits are those traits which are hidden and can't express themselves in the next generation .
📌• Law of segregation is also known as law of purity of gamates or the law of separation. It states that the alleles are separated to the gametes during meosis , so that the alleles will not get mixed. And always pure gamates are transferred to the offspring.
📌• Phenotypic Ratio of the offsprings - 2:2
Genotypic Ratio - 2:2
@@leviackerman4713 well i guess I am wrong
@@DhirajKumar-zo3mu yes you are
In the class he explained that ratio should be 3:1 how did I get 2:2
@@jozmit6640 we is walking here
Your ratio is wrong
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Im from Bangladesh..after watching a lot of videos on this chapter i ended up here and Im sure these will be my last videos on genetics cause i got all the answers i was searching for....thank you so much for these amazing lessons... Explanation was really fascinating... Thanks once again🙏❤️
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Study Mandel's cross between two plants with a pair contrasting characters:
RRYY. ×. rryy
Round Yellow. ( Wrinkled Green)
He observed four types of combination in F2 generation. Which of these were new combination?Why do new features which are not present in the parents appear in F2 generation?
Answer plz 🥺
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Explaination🔥
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Superb explanation sir
The Anwer of 3 is 2:2.
hi ARMY😀💜
Same I have got the Sam ans
Yaa its correct
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beautiful explanation
Yah! I can recall the question
1. Dominant traits are those that express themselves even in the presence of an alternative gene whereas recessive traits are those that can't express themselves in the presence of alternative gene
2. It is law in which the genes separate out
3. 3:1 am I right????
Answer for 3rd should be 2:2.
Yes 3rd answer is 2:2
Because, we get the traits like this
Tt,tt,Tt,tt so here we are getting 2 tall traits and 2 short traits
Hence the ratio is 2:2
Hey i think it is 1:1
As in ratio common factor is cancelled.....
@@pradeepdas1640 math's dude
@@suraj_Suraj yeah me tooo got same answer
Heredity is such a complex topic
Dominant traits are those traits which are able to express themselves in heterozygous condition
Recessive traits are the one which can't express themselves in heterozygous condition.
Law of segregation states that during gamete formation, alleles get separated
Ratio of offsprings-1:1
Fabulously explained
14:30 maybe BLUE came from F1 Grandparents ??
Bangur cement - sasta nhi sabse achcha
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Love you sir
Khan academy!! The video is fabulous
But I have a question that I am struggling with since a long time
Can anyone please answer me?
My question is- In genotype Tt, the letters Tt collectively represent a single gene or the letter T is a separate gene and letter t is a separate gene?
And what are alleles???
If you know the answer, please help me
Your one reply can clear my doubt🙏
Bro T and t are the two alleles for the charachter of height. They are like 2 varients of a same charachter. Likewise in the case of flowers Chrachter is Flower color and the alleles would be Violet and White i.e. varients of the charachter.
TT, Tt and tt represent genotypes.
Alleles are points on a gene which expresses certain varient of a charachter. Example,lets say we are studying the Charachter of eye color on a gene located on Chromosome 2 then the alleles would be Blue, Green, Black, Brown etc.
@@butimnotsid Got it✌️
Thanks a lot....wonderful explanation
@@oz4959 :)
Love to see that people are willing to help you ......
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so what's the difference between the law of segregation and the law of independent assortment?
Good Job!
Ans of 3rd question is-2:2
Super sir
Thanku sir U have great teaching skills
good
Such an amazing explanation... Really liked it..
Thank you so much sir...
You are great...🙏
0:03
Maybe your friend's mom was cheating with his dad 😂😂
Thank you Yasmeen ma'am for sharing this video in our class group
Myself Ishpreet Singh Bhatia Class-10D
💯
I think you have a crush on your beautiful blue-eyed friend man.
(Great vid tho, love it)
You are a legend!
* dominant traits are the traits which express themselves in a generation whereas recessive traits are hidden and do not express themselves.
* law of segregations states that when a trait is passed into a gamete , it gets separated
*3:1
Thnxxx sir it really help me to understand 🙏🙏🤘🤘
whenever he explains, everything goes straightly into my brain
Thank sir you explain very well 😇😇😇
1:2:1 is a genotypic ratio
3:1 is a phenotypic ratio...
0:03
9:18
You are teacher
Soo awesome
How could someone dislike this! 😘
They need someone to taught them in their respective languages
Ediot
Haters gonna hate it
they're called bots :)
@@prem7508 it is "idiot" Not ediot understand idiot
Mendal and his PEAS.💀
Sir I am proud of you because you are a teacher who analyses every aspect of content and tell Indian english and teach with wh questions.so I salute u
He isn't proud of the Indian accent though, he fakes an accent.
Why taller plant had dominace?
Really nice fabulous 👍
Can you please tell me which application or software you use to create these videos
Someone help me with third question unable to get the answer
1:00
0:10 Seems like Markus is up for some shocking news.
0:45
I can't ignore that 'THALL PPHLANTS'😂
the ratio is 2:2 for the last question
The last question answer is 1/2 right?
0:39
0:06
12:21 sir i have a doubt.... Here it may have tall trait as rececessive ?means (Tt) but T is recessive? 😢 help
Did he just said "chalo" in the middle?
It means the friend's father and mother were brother and sister 😂
My Last que answer is 2:2 ... It is right or not ???