XO type of sex determination and XY type of sex determination are the examples of:
a. male heterogamety
b. female heterogamety
c. male homogamety
d. both (b) and (c)

Options

A. male heterogamety
B. female heterogamety
C. male homogamety
D. both (b) and (c)

Answer

A

Explanation

In XO type and XY type sex determining mechanisms, males produce two different types of gametes, (a) either with or without X-chromosome (XO type), (b) some gametes with X-chromosome and some with Y-chromosome (XY type) Such type of sex determination mechanism is designated to be the example of male hetergamety. In both, female are homogametic and produce X type od gametes in both the cases and have XX genotype