Two genes ‘A’ and ‘B’ are linked. In a dihybrid cross involving these two genes, the F1 heterozygote is crossed with homozygous recessive parental type (aa bb). What would be the ratio of offspring in the next generation?
1
1 ∶ 1 ∶ 1 ∶ 1
2
9 ∶ 3 ∶ 3 ∶ 1
3
3 ∶ 1
4
1 ∶ 1