Question

explain gender determination mechanism in birds and honeeybee ?

Answer 1

The sex chromosomes in birds and some insects like honey bee, butterfly etc. are determined as Z and W. The male is homomorphic (ZZ) and the female is heteromorphic (ZW). W chromosome carries female sex determining genes and duplication of Z chromosome indicates male sex.

A female honey bee usually lays two types of eggs – fertilized eggs and unfertilized eggs. Fertilized eggs give rise to female honey bees among which those who are fed with royal jelly becomes fertile female or queen and others become sterile female or worker bees. The honey bees that are borne from unfertilized eggs are male honey bees or drone.