A punnet square predicts a 9:3:3:1 ratio for phenotypes. Explain what that ratio means.

Question

thomaster · Answer

9 of the offspring will be homozygotic or heterozygotic for both dominant traits
3 of the offspring will be homozygotic or heterozygotic for 1 dominant trait
3 of the offspring will be homozygotic or heterozygotic for 1 recessive trait
1 of the offspring will be homozygotic for both recessive traits.

aaronq · Answer

That ratio also means that the genes assort independently (follow mendelian genetics) meaning there is no linkage between them.