If a baby boy inherits a recessive allele from his mother, in which of the following circumstances would he most likely exhibit that recessive trait?

The allele is X-linked
His mother’s father also exhibited the trait
The allele skips a generation
He inherited the dominant trait from his father

I know the 2nd answer is not correct. Would it be the first answer, the allele is X-linked?

Question

If a baby boy inherits a recessive allele from his mother, in which of the following circumstances would he most likely exhibit that recessive trait?
 
The allele is X-linked
His mother’s father also exhibited the trait
The allele skips a generation
He inherited the dominant trait from his father

I know the 2nd answer is not correct.  Would it be the first answer, the allele is X-linked?

aaronq · Answer

yep, if it's X linked, and the only X chromosome it got was from his mom (his dad gave him a Y) then he will exhibit such trait.

anonymous · Answer

so the correct answer is the allele is x-linked?

aaronq · Answer

yep

anonymous · Answer

thank you so much for your confirmation.

aaronq · Answer

no problem at all