When an individual has both alleles of a contrasting character,it is said to be:

What is the proportion of dwarf and tall plants in the $F_{2}$-generation of Mendel's experiment?

$A$ tall true-breeding garden pea plant is crossed with a dwarf true-breeding garden pea plant. When the $F_1$ plants were selfed,the resulting genotypes were in the ratio of:

Based on which experiment was the Law of Purity of Gametes given by Mendel?

$A$ single heterozygous yellow wrinkled seeded pea plant shall produce gametes.

If two individuals with genotype $Bb$ are crossed and they produce two offspring,what is the probability that the second offspring will show the recessive trait,given that the first offspring shows the dominant trait?