The sex chromosomes in females are
$XX$
$XY$
$YY$
$XXY$
Two different types of gametes in terms of the sex chromosomes, are produced by
What type of sex determination is observed in grass hopper ?
The male human is represented by sex chromo-somes
$(a)$ 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.
How is sex determined in various organism ? Give historical background of sex determination.