The female birds have

Sex chromosomes of a female bird are

In birds, the females are

Human females have

Assertion :-In birds, the females have one Z and one W chromosome, whereas male have a pair of Z-chromosomes besides autosomes. Reason:- In birds, sex of the offsprings is decided by the temprature of surroundings when they are released.

Assertion :-In birds, the females have one Z and one W chromosome, whereas male have a pair of Z-chromosomes besides autosomes. Reason:- In birds, sex of the offsprings is decided by the temprature of surroundings when they are released.

The human male and female bird are heterogametic,while the human female and male bird are homogametic .Why they are called so?

Sex chromosme of a female bird are represented by :

Sex chromosomes of a female bird are represented by