Question

Using flower position, set up a Punnett square and determine the resulting genotypes and phenotypes.

Answer 1

There are two possible flower positions in sweet pea plants. The axial position is dominant, while the terminal position is recessive. Let's assign the letters A and a for these respective alleles. Now for a test cross, the cross would look like:

Aa x Aa

	A	a
A	AA	Aa
a	Aa	aa

From the above cross, we can determine that the genotypes are AA, Aa, and aa, in the ratio of 1:2:1 respectively.

AA and Aa will display the phenotype for axial flowering plant, while aa will display the phenotype for terminally flowering plant, in the phenotypic ratio of 3:1 respectively.