Question

how is the sex determination mechanism different in the birds ? Is the sperm or the egg responsible for the sex of the chicks.

Answer 1

yes it is related and till hen do not sit at there eggs till i can not make new checks

Answer 2

In birds, the sex of the embryo is determined by the egg, not the sperm (as it is in humans). Avian sex differentiation is not determined by XY chromosomes like it is in humans and most mammals (or even the XO system used by some insects). In those systems the sex is determined by the sperm, by what the male contributes to the offspring. By contrast, birds have a ZW system of sex determination (shared with butterflies, moths, fish and reptiles). In that system, sex is determined by the female within her ova, and the sex of offspring is not affected at all by the sperm which the male contributes. Some people think it is this difference which makes parthenogenesis possible for birds. Parthenogenesis occurs when unfertilized eggs see embryonic development.


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