Question

In sesame plants, the one pod condition (P) is dominant to the three-pod condition (p), and normal leaf (L) is dominant to wrinkled leaf (l). These traits are inherited independently. Determine the genotypes for the two parents for all possible matings producing the following progeny:

1. 318 one pod/normal and 98 one pod/wrinkled (there will be several answers)

2. 323 three pod/normal and 106 three pod/wrinkled

3. 150 one pod/normal, 147 one pod/wrinkled, 51 three pod/normal and 48 three pod/ wrinkled

Answer 1

One pod = PP or Pp

Three pod = pp

Normal leaf = LL or Ll

Wrinkled leaf = ll

1. Both the progenies are having one pod. It means both the parents were having one pod. One will be PP and other will be Pp or both of them will be PP.

Most of the progenies are having normal leaves and some are having wrinkled leaves. So, both the parents must be heterozygous for leaves.

PPLl × PPLl

PPLl × PpLl

2. All the progenies have three pods. It means both the parents must be pp. Most of the progenies have normal leaves and some have wrinkled. So, both the parents must be Ll.

ppLl × ppLl

3. Most of the progenies have one pod and some have three pods. So, both the parents will be Pp.

Half of them have normal leaves and half have wrinkled leaves. So, one will be Ll and the other will be ll.

PpLl × Ppll

Please rate high.