Answer to Question #242313 in Genetics for Khangwelo Lovers

Question

In peas, a gene for tall plants (T) is dominant over its allele for short plants (t). The gene for smooth peas (S) is dominant over its allele for wrinkled peas (s). The genes are not linked. Determine both phenotypic and genotypic ratios for the results of each of the following crosses:

3.1. heterozygous tall heterozygous smooth x heterozygous tall heterozygous smooth.                                                                                          [26 marks]

Answer 1

TtCcs x TtCc

Gamety TC/Tc/tC/tc X TC/Tc/tc/tc

Phenotypic ratio -

9 : 3 : 3 : 1