If the genotype of an individual consists of only one type of alleles at the same locus,it is called:

In his experiments,Mendel observed wrinkled peas. These wrinkles are caused by the accumulation of sugar instead of starch. This is due to the deficiency of which enzyme?

$A$ test cross is performed to determine the:

Mendel conducted his hybridization experiments for how many years?

$A$ study of heredity and hereditary characters is called as

The cause of variation is hidden in the process of $.....P.....$ - this knowledge was acquired by humans in $.....Q.....$.
$\quad \quad P \quad\quad\quad Q$