When an allele fails to express itself in the presence of another allele, the former is said to be

If Mendel had studied $7$ pairs of traits in a plant with $12$ chromosomes instead of $14$,then:

Statement-$I$: The segregation of alleles is a random process and so there is a $50\%$ chance of a gamete containing either allele.
Statement-$II$: Alleles do not show any blending at either $F_1$ or $F_2$ generation.

How many pairs of true-breeding pea plant varieties were selected by Mendel,which were identical except for one character with contrasting traits?

Match the following (Column-$I$ with Column-$II$):

Column-$I$	Column-$II$
$a$. Allele	$i$. Two alleles of a gene are identical
$b$. Genotype	$ii$. An individual having two different alleles of a gene
$c$. Homozygous	$iii$. Genetic constitution of an organism
$d$. Heterozygous	$iv$. Alternative forms of a gene

According to Mendelism, which of the following traits shows dominance?