Solution

Mendel choose the garden pea plant for his experiment because: (a)The size of the pea plants are small, easy to grow and also have a short life cycle. (b) Large number of true breeding varieties of pea plants are available. (c) Self pollination and cross pollination are possible with pea plants. Genes which are able to express themselves in the presence of their alleles are called dominant genes, they can be expressed in homozygous and heterozygous conditions whereas the genes which are not able to express themselves in the presence of their alleles are called recessive genes. These can only be expressed in homozygous conditions.