Question

In a species of wild lupine flower, the smooth seed allele (S) is completely dominant over the wrinkled seed allele (s). If the alleles for height are incompletely dominant, such that TT is tall, Tt is intermediate, and tt is short, what will result from crossing a smooth-seeded short (SStt) plant with a wrinkled-seeded tall (ssTT) plant?

Answer 1

Genotype of offspring – SsTt

Phenotype - Smooth and intermediate

Step-by-step explanation:

Given -

smooth seed allele (S) is completely dominant over the wrinkled seed allele (s)

Such that SS and Ss will be smooth and ss will be wrinkled

And

Alleles for height are incompletely dominant

TT - tall

Tt - intermediate

tt - short

Genotype of parents

SStt - Gametes St, St, St, St

and

ssTT- Gametes sT, sT, sT, sT

St St St St

sT SsTt SsTt SsTt SsTt

sT SsTt SsTt SsTt SsTt

sT SsTt SsTt SsTt SsTt

sT SsTt SsTt SsTt SsTt

Genotype of offspring – SsTt

Phenotype - Smooth and intermediate