In birds,the female carries an unmatched pair of chromosomes (denoted WZ),corresponding roughly to the XY chromosomes in mammalian males,and male birds carry a matched set of chromosomes (denoted WW),corresponding to the pair of XX chromosomes in mammalian females.Therefore,in birds the ________ chromosome determines the sex of the offspring,and it is gametes from the ________ parent that determine sex.

Question

Quizplus · Accepted Answer

In birds, the female carries a pair of sex chromosomes denoted as WZ, where W is the larger chromosome and Z is the smaller one. The male carries a matched pair of sex chromosomes, denoted as WW. Therefore, it is the female bird's gamete that determines the sex of the offspring. If the egg carries a W chromosome, the offspring will be female (ZW), and if the egg carries a Z chromosome, the offspring will be male (ZZ). Thus, option B is the correct answer as the Z chromosome determines sex, and gametes from the female parent determine the offspring's sex.

In Birds,the Female Carries an Unmatched Pair of Chromosomes (Denoted