The formation of a male child depends on the sperms because
Sperms may be $X$ and $Y$
Sperms are all $Y$
The eggs from the other ovary may be $Y$
Sperms are more active
Bird females have chromosome arrangement as
Genetic identity of a human male is determined by
Sex of a human child is determined by
What is heterogametic ? Explain by giving proper examples ?
Initial clue about the genetic/chromosomal mechanism of sex-determination can be traced back to some of the experiments carried out in