Using a Punnett Square, work out the distribution of phenotypic features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus.

When a cross is made between a tall plant with yellow seeds and a tall plant with green seeds (TtYy), what proportion of phenotype in the offspring is expected to be tall and green?

When a cross is made between a tall plant with yellow seeds and a tall plant with green seeds (TtYy), what proportion of phenotype in the offspring is expected to be dwarf and green?

Explain the following term with examples:

Co-dominance

Explain the following term with examples:

Incomplete dominance

Write a brief note on gene mutations.