DAT destroyer #298 (weird question)

[plaier]

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This Question is so weird.
The question is asking the probability that the male child will be colorblind.

Since male child get X from his mom, why the problem gives so many informations about the man?
I dont need to know he is normal or colorblind.

and it doesnt specify about mom.
i know one of her X is normal from that her daughter is normal, but still dont know about another X.
she could be a carrier or normal woman.

and the answer is 0%.

anyone knows the purpose of this question?

This question is so dumb.
and there are more questions like this.
i feel like i am wasting my time with DAT destroyer.

Is this DAT destroyer really helpful?

 

[Albuterol]

since the female is normal she will have 2 healthy X chromosomes and will donate one or the either. It doesnt matter if the male is affected by colorblindness or not since he has to donate a Y chromosome and colorblindness is x-linked. The male child born will be healhty and be XY. Therefore, a 0% chance of the male child being colorblind.

 

[utdent20]

Very crisp answer albuterol...to the point..i guess this question is outta the new destryoer.. i have the 2007 ed.

 

[plaier]

since the female is normal she will have 2 healthy X chromosomes and will donate one or the either. It doesnt matter if the male is affected by colorblindness or not since he has to donate a Y chromosome and colorblindness is x-linked. The male child born will be healhty and be XY. Therefore, a 0% chance of the male child being colorblind.

You dont know whether she is normal or carrier.

 

[DocHowell]

Not everyone sees right through the fact that you don't need info about the father. You happen to be bright 🙂 It's a blessing.