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.
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
If the Assertion is correct but Reason is incorrect.
If both the Assertion and Reason are incorrect.
$(a)$ In humans, males are heterogametic and females are homogametic. Explain. Are there any examples where males are homogametic and females heterogametic ?
$(b)$ Also describe as to who determines the sex of an unborn child ? Mention whether temperature has a role in sex determination.
The sex chromosomes in females are
Two different types of gametes in terms of the sex chromosomes, are produced by
A couple has $6$ children-$5$ are girls and $1$ is boy. The percentage of having a girl on next time is
Describe haploid diploid sex determination system ?