Question

A tall pea plant with red flowers was crossed with a dwarf white flowered plant and four kinds of offsprings were produced in equal proportions. The genotype of the tall red parent was 

(A) TTRr

(B) TtRr

(C) TTRR

(D) TtRR 

Answer 1

Correct Option- (B) TtRr 

Explanation -

This is a dihybrid test cross, so the tall pea plant with red flowers has to be TtRr, i.e. heterozygous.