The sex chromosomes in females are

$(a)$ 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.

In humans,the inheritance of sex-linked traits takes place through

Which of the following animals can be formed without fertilization?

Which of the following represents the genetic constitution of a male grasshopper?

Barr body in mammals represents