Q.16.  Two genes 'A' and 'B' are linked. In a dihybrid cross involving these two genes, the F1 heterozygote is crossed with homologous recessive parental type (aa bb). What would be the ratio of offspring in the next generation?

a.  1 : 1 : 1 : 1

b.  9 : 3 : 3 : 1

c.  3  : 1

d.  1 : 1


(a).  1 : 1  It can be explained by the following test cross.

The other options are incorrect.