Which one of the following conditions correctly describes the manner of determining the sex?
Homozygous sex chromosomes $(ZZ) $ determine female sex in birds.
$XO$ type of sex chromosomes determine male sex in grasshopper.
$XO$ condition in humans as found in Turner’s syndrome, determines female sex.
Homozygous sex chromosomes $(XX)$ produce male in Drosophila.
$X$ -chromosome or $X$ - body was first observed by.............
There are five daughters and no son in a family. It may be due to
$(a)$ 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.
Describe haploid diploid sex determination system ?
In our society a woman is often blamed for not bearing male child. Do you think it is right ? Justify.