allele - small section of gene that codes for a trait homozygous - same allele for both parent, mixture heterozygous dominant - wins recessive - nope genotype - individual alleles
This is so good video i literally lost main points cuz i didn’t focus at school for like 2 weeks This explanation explained everything can not believe this has whole main points
Please remember that when using the term homozygous that you have to put dominate or recessive after it. You have to be clear as to which set of alleles are present.
you can identify a dominant trait base on the letter itself. If the letter is BIG then that represents a DOMINANT TRAIT but if the letter is small then that represents a recessive trait. I hope it helps. :)
RDX of WEEKENDS well you can find lists in internet, or guess by logic like black eyes are dominant over blue and being right handed is dominant over being left-handed During tests they usually provide information however there are some problems were you have to guess which trait is dominant. In that case you should look at parents and F1 and see which trait shows up.
0:44 an allele is a part of a chromosome that codes (so it's a gene) for a specific -gene- protein* However, there are genes that encode for ARN that has a full function in itself and does not need nor goes thru translation (taking a mRNA into the ribosomes to make proteins). Am I right?
When describing the Punnett Square, your explanation is partially wrong. Although the combination of alleles shows 2 x AA genotypes and 2 x AO genotypes, this does not mean that half of the children will have AO and half will have AA. Consider what would happen if this couple only ever had one child? There is no order of dominance for which aspect of the allele will be expressed in the zygote from each parent (that we know of). It is not like the father will give the A allele to the first child and the mother will also give their A to the child to make AA, this is random as far as we know and influenced by MANY things but not by dominance of inheritance. So it would come down to probability as opposed to actual allocation of each allele. Therefore, there is a 50% probability that the child will have genotype AA, 50% probability the child will have type AO but a 100% probability the child will have phenotype blood group A
I actually came to the comment section looking for such a comment because I thought that I was wrong in thinking that Punnet squares calculate the probability of genotype and phenotype manifestation.
I was about to show this to my students today. I'm glad I doubled checked before pushing this material out. You are right. It's not about the "number of children" having those genotypes, but the Punnet Square shows us the "probability" of inheriting the gene.
I did a degree in biomedical sciences and really enjoyed it, but now I'm a software developer. A completely different field of work, but I still come back to learn more about biosciny because I really enjoy it
Not the best example for Mendelian Genetics - ABO is not usually considered Mendelian because A and B are codominant to each other - which is a concept past Mendelian genetics. Someone with an A and B allele has type AB blood.
As far as my knowledge. Its not 75% of children have blood A and 25% children have blood O Its the probability in a same child ( a child born will have 75% probalility to have blood group A and 25% probability to have blood group O , and its same to every child born ).
idk if its just me, but i'm trying to watch this and can't pay attention bc I keep thinking this guy sounds exactly like the main guy in the Netflix series "Love"
Short, detailed, straight to the point. Great resource for a quick review before class. Thank you! :)
i mean its khan academy so ofc!
i have an exam in 20 minutes
Same! Except 3 year difference
@@elki-otv5051Same except 3 day difference 😓
Yoooooo same
@@ezraagi392 same except 1 month difference
@@breannabre7760 same except I've got one tomorrow😭
Crisp, clear, and concise.
Thank you for providing such a remarkably condensed version of what Mendelian genetics is all about, and without a ton of talking. Well done!
allele - small section of gene that codes for a trait
homozygous - same allele for both parent, mixture
heterozygous
dominant - wins
recessive - nope
genotype - individual alleles
Thanks 😊
thanks man
Phenotype: observable physical traits
Honestly learnt better from this video then my actual class...
This is so good video i literally lost main points cuz i didn’t focus at school for like 2 weeks This explanation explained everything can not believe this has whole main points
Very helpful and easy to understand. Thank you so much for this video!
Khan Academy never disappoints. Straight to the point and easy to understand. Great video.
Learning made simple
Thank you. I learned a lot. Keep posting. Watching from philippines.
Please remember that when using the term homozygous that you have to put dominate or recessive after it. You have to be clear as to which set of alleles are present.
This is extremely helpful. Thank you so much !
such clear and easy-to-understand explanation. helped a lot
Not 75% or 25% of the children but 75% or 25% chance of each child expressing the the genes phenotypically
Thank you
Very simple to understand .
Ty sir concept crystal clear 👍
Is Mendelian inheritance is the traits from your mother and father?
how to know that which one is dominant??? reply..
Ujjval AKA THE *B.A.A.P* Exactly 😕
you can identify a dominant trait base on the letter itself. If the letter is BIG then that represents a DOMINANT TRAIT but if the letter is small then that represents a recessive trait. I hope it helps. :)
Amazing Video. Thanks
This was helpful thank you
how can u find which one is dominant?
RDX of WEEKENDS well you can find lists in internet, or guess by logic like black eyes are dominant over blue and being right handed is dominant over being left-handed
During tests they usually provide information however there are some problems were you have to guess which trait is dominant. In that case you should look at parents and F1 and see which trait shows up.
O is recessive A is dominant then what is B?
It is codominant, so your blood type would be AB
i love you
0:44 an allele is a part of a chromosome that codes (so it's a gene) for a specific -gene- protein*
However, there are genes that encode for ARN that has a full function in itself and does not need nor goes thru translation (taking a mRNA into the ribosomes to make proteins). Am I right?
Yes 100%
Rank rou raggy
When describing the Punnett Square, your explanation is partially wrong. Although the combination of alleles shows 2 x AA genotypes and 2 x AO genotypes, this does not mean that half of the children will have AO and half will have AA.
Consider what would happen if this couple only ever had one child? There is no order of dominance for which aspect of the allele will be expressed in the zygote from each parent (that we know of). It is not like the father will give the A allele to the first child and the mother will also give their A to the child to make AA, this is random as far as we know and influenced by MANY things but not by dominance of inheritance. So it would come down to probability as opposed to actual allocation of each allele.
Therefore, there is a 50% probability that the child will have genotype AA, 50% probability the child will have type AO but a 100% probability the child will have phenotype blood group A
I actually came to the comment section looking for such a comment because I thought that I was wrong in thinking that Punnet squares calculate the probability of genotype and phenotype manifestation.
I was about to show this to my students today. I'm glad I doubled checked before pushing this material out. You are right. It's not about the "number of children" having those genotypes, but the Punnet Square shows us the "probability" of inheriting the gene.
Thank you
I did a degree in biomedical sciences and really enjoyed it, but now I'm a software developer. A completely different field of work, but I still come back to learn more about biosciny because I really enjoy it
What made you decide to not go forward with biomedical science ?
I hope you are thriving! I'm glad you still found interest in bio stuff :D
Not the best example for Mendelian Genetics - ABO is not usually considered Mendelian because A and B are codominant to each other - which is a concept past Mendelian genetics. Someone with an A and B allele has type AB blood.
Short, punchy and very clear..great thanks Khan Academy.
As far as my knowledge.
Its not 75% of children have blood A and 25% children have blood O
Its the probability in a same child ( a child born will have 75% probalility to have blood group A and 25% probability to have blood group O , and its same to every child born ).
What if an F1 generation were crossed to both P1 generation? what's the result? I'm really having a hard time in this problem😭
Alleles are not dominant and recessive, phenotypes are dominant and recessive.
Blood type is codominance, not complete dominance
wait, how 46 chromosomes contain DNA that make each CELL unique? I thought each person.
Blood type is multiple allele, so it's not Mendelian genetics..?!
Mendelian genetics is very oversimplified.
Excellent video
Actually it‘s blood type 0
Thank you for uploading this!
Thanks
yh
Thank you very much☺😅💘
Thank you!
The difference between genotype and phenotype reminds of the difference between microstates and macrostates, in physics.
DUDE YOUR A LIFE SAVER THX FOR THIS VIDEO!!!!!!!!
Where are you now ?? R u graduated
Khan academy ❤❤
thanks sir
thanks tol
Thank you so much! Your video is very clean and easy to follow. Also, the examples you show in the video are concise and well organized.
Ashley Bryant GOL 106 V1. I learned that an allele is a specific, small piece of a single chromosome.
believe it or not, its the stickman he draw that helped me out a lot. subscribed >:)
Thanks Ross☆ Have some roses from me as gratitude 🌹💐💐🌸
wow, great explaining!! ❤
Very helpful, thank you!
4:40
For a summary
super clear
On point.
lovely
Veeeeeeery interesting 🤔
I am so involve with khan academy
Thanks a loooooooooot :)
A really great video! thank you so much!
Thank you for make it so clear
thanks khans academy
clutch life
This was so helpful. I was reading and become totally overloaded with a lot of information. This was straight to the point.
idk if its just me, but i'm trying to watch this and can't pay attention bc I keep thinking this guy sounds exactly like the main guy in the Netflix series "Love"