Initial clue about the genetic/chromosomal mechanism of sex-determination can be traced back to some of the experiments carried out in
Human beings
Birds
Insects
Plants
What type of sex determination is observed in grass hopper ?
Determination of sex of a child depends upon
In bugs and cockroaches, the sex determination takes place by
A couple has $6$ children-$5$ are girls and $1$ is boy. The percentage of having a girl on next time is
In man the normal number of chromosomes is