Question

A cross was carried out between a pea plant heterozygous for round and yellow seeds with a pea plant having wrinkled and green seeds. 

(a) Show the cross in Punnett square. 

(b) Write the phenotype of the progeny of this cross. 

(c) What is this cross known as ? State the purpose of conducting such a cross.

Answer 1

(a)

(b) Round and yellow -25% 

Wrinkled and yellow - 25% 

Round and green- 25%

Wrinkled and green - 21%

(c) Test cross, to identify the genotype of unknown if it is homozygous dominant or heterozygous dominant.