In male grasshoppers and butterflies,there are two pairs of autosomes and .....

What type of sex determination is observed in humans? Explain.

$A$ medical technician, while observing a human blood smear under the microscope, notes the presence of a Barr body close to the nuclear membrane in the $WBC$. This indicates that the person under investigation is:

According to the genic balance theory of sex determination in Drosophila proposed by Bridges,which $\frac{X}{A}$ ratio indicates a superfemale?

In humans,the chromosomal condition of a male is:

In which one of the following,gametogenesis takes place only by mitosis?