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

When a true breeding pea plant that has yellow seeds is pollinated by a plant that has green seeds,all the $F_1$ plants have yellow seeds. This means that the allele for yellow is

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

Consider the following four statements $I, II, III$ and $IV$ and select the correct statement:
$I.$ Mendelian experiments have a large sampling size, which gave greater credibility to the data that he collected.
$II.$ Recessive allele influences the appearance of the phenotype even in the presence of a dominant allele.
$III.$ Mendel analysed qualitative characters in garden pea.
$IV.$ In $F_2$-generation of a Mendelian monohybrid cross, the tall and dwarf traits were identical to their parental types and show no blending inheritance.

$A$ test cross is performed by:

The term 'genetics' was coined by: