Give differences : Male heterogamety and Female heterogamety
Male heterogamety | Female heterogamety |
$(1)$ Male produces two types of gametes. | $(1)$ Female produces two types of gametes |
$(2)$ e.g. Human male produces gametes of $\mathrm{X}$ and $Y$-types. | $(2)$ e.g. Female birds produces gametes of $Z$ and $\mathrm{W}$ types. |
How is sex determined in various organism ? Give historical background of sex determination.
A male child would be born to parents if
Delete the odd one:
Assertion : In humans, the gamete contributed by the male determines whether the child produced will be male or female.
Reason : Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X-$ chromosome and some on $Y-$ chromosome.
In melandrium the sex determination type is