Exemplar Problems

Question:

When a cross is made between a tall plant with yellow seeds (TtYy) and a tall plant with green seeds (Ttyy), what proportions of phenotypes in the offspring could be expected to be

(a) Tall and green

(b) Dwarf and green plant

Answer:

(a) In this case, we are looking for individuals with the genotype TtYy. The offspring will have a 1/4 chance of inheriting this genotype.

(b) In this case, we are looking for individuals with the genotype ttyy. The offspring will have a 1/4 chance of inheriting this genotype.