In birds, sex is determined by a ZW chromosome scheme. Males are ...

[Hungry!]

In birds, sex is determined by a ZW chromosome scheme. Males are ZZ and females are ZW. A recessive lethal allele that causes death of the embryo is sometimes present on the Z chromosome in pigeons. What would be the sex ratio in the offspring of a cross between a male that is heterozygous for the lethal allele and a normal female?
A) 2:1 male to female
B) 1:2 male to female
C) 1:1 male to female
D) 4:3 male to female
E) 3:1 male to female

[camila]

100% it's A, don't forget to gimmi a thumbs up

[Hungry!]

Thanks so much, you were right on.