Which of the following terms represents a pair of contrasting characters?

The synthesis of starch in pea seeds is controlled by a single gene. This gene has two alleles,$B$ and $b$. If the shape of the pea seed is considered as the phenotype,what type of inheritance does this represent?

Which of the following traits selected by Mendel shows a recessive expression in pea plants?

Mark the odd one (w.r.t. true breeding line).

Gregor Mendel was born in which century?

$A$ true-breeding pea plant can be obtained by .......