late but it's because affected mothers can have affected daughters. The rule states that affected sons have affected mothers and affected fathers will always have affected daughters, but it never says that affected mothers can't have affected daughters. The reasoning behind this specific wording is that affected fathers simply cannot have affected sons because the fathers give the 'y' chromosome and not the diseased 'x'. However, mothers have 2 'x' chromosomes and since this particular tree is dominant, she can give one of the diseased 'x' chromosomes to her daughter. The whole reasoning as to why affected sons must have affected mothers is that they can't get the affected 'x' from their father because they get the 'y' from their father, so the affected 'x' HAS to come from the mother. However, the affected daughter can get the affected 'x' from either mom or dad.
You're a talented teacher not every one has that talent of teaching a hard topic and making it look easy. Thank you gor your time and material
I could not understand my professor in two sessions. You video made me an expert. Thank you, Sir!!!
a very systematic and organized approach! thanks
I just watched all your videos on pedigrees thank you this helped a lot
thank you very much you single-handedly saved me from failing my test
This is just what I needed. Thank you, Sir!
Teaching is a gift that not everyone has. You clearly have it
Made it so easy!
Thanks a lot :)
:P
Why isn't generation 4, person 10 affected..if the mother is affected, shouldn't the daughter also br affected since the trait is x-linked dominant?
Thank You Sir
You Look It So Easy...
great video!
Really good! Appreciate the explanation
thanks dude, you saved my bio grade :)
great video!! helped me a LOT!!!
No# ambiguity
Due regards .
Love from Kashmir.
You make it easy ...
Thanks ....
thanks Sir
IV-3 shouldn't be unaffected ?? or am I just confused, love ur videos
i got good mark in Medical genetics :))
thank you sir
Congrats
You're the man!
Thank you very much sir , that helped me alot
AMAZING!!!!!!!!!
This was helpful. Thanks
you teach well sir
Genotype II-1 , III-1, aa are confusing to me. How did they get aa when father doesn't have one ''a''.
Adrian Smidt because they are unaffected
Thank you !!!
it is very helpful though the last generation 4-7 makes it wrong.
the daughters wont be affected but carriers unless the mother is affected as well
thank you so much!
Thanks a million :)
I like it all but I hope he gets a glass board so he doesn’t covers 90% of the board
Thank you sir!
Thank You Mate
pleeessssssssssssssss sir more video for me about inhiretance
Thanks man!
thank you so much
thank you so much sir
II-4 doesn't have a infected mother(I-2)? maybe
no, cos II-4 is married with II-3, he doesn't belong to that rule, because he's parent aren't shown, he's only married into the family
Shouldn't Aa be a carrier?
in dominant there are no carriers , only affected.
how a father with x linked dominant will exist ! ?
IV 4 and V 4 and 6 do not make sense based off his explanantion
late but it's because affected mothers can have affected daughters. The rule states that affected sons have affected mothers and affected fathers will always have affected daughters, but it never says that affected mothers can't have affected daughters. The reasoning behind this specific wording is that affected fathers simply cannot have affected sons because the fathers give the 'y' chromosome and not the diseased 'x'. However, mothers have 2 'x' chromosomes and since this particular tree is dominant, she can give one of the diseased 'x' chromosomes to her daughter.
The whole reasoning as to why affected sons must have affected mothers is that they can't get the affected 'x' from their father because they get the 'y' from their father, so the affected 'x' HAS to come from the mother. However, the affected daughter can get the affected 'x' from either mom or dad.
He forgot what he was teaching at the last part.
does X-linked same as sex linked? thanks
Yes, they are both the same deal.
Thank you, brilliant 10/10.
||-1 can't have aa bcz male have AY.