Mendel selected ....... true-breeding pea plant varieties.

Given below are two statements:
Statement $I$: Back cross is the crossing of $F_1$ hybrid with one of the two parents from which they were derived.
Statement $II$: Test cross involves the crossing of $F_1$ hybrid with its homozygous recessive parent.
In light of the above statements,choose the correct answer from the options given below.

Which is a dominant character of a pod of pea?

The cross used to determine the genotype of a plant showing a dominant phenotype is known as:

Which of the following is $NOT$ one of the seven pairs of contrasting traits studied by Mendel in pea plants?

$A$ factor (allele) is dominant if it is expressed in ...............