Question

2.6) Red colour in wheat kernels is produced by the genotype R-B-, white by the double recessive genotype (rrbb). The genotypes R-bb and rrB- produce brown kernels. A homozygous red variety is crossed with a white variety. What phenotypic results are expected in the F1 and F2?

Answer 1

a

The expected phenotype in the F1 is all red (RrBb)

b

Cross between

RrBb X RrBb

The expected phenotypes of the F2 progeny is red, brown, and white in the ratio of 9:6:1.