What would be the sex ratio in the offspring of a cross, Ask an Expert

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In birds, 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. This locus is hemizygous in females (ZW). 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

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Category:- Biology
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