Question

in pea plants, tallness (t) is dominant to shortness (t). what are the predicted percentages of the genotypes of the offspring if a homozygous short plant is crossed with a heterozygous tall plant? 25 percent tt, 75 percent tt 25 percent tall, 75 percent short 50 percent tt, 50 percent tt 50 percent tall, 50 percent short

Explanation:

Step1: Determine parent genotypes

Homozygous short plant: tt; Heterozygous tall plant: Tt

Step2: Set up Punnett - square cross

	t	t
t	tt	tt

Step3: Calculate genotype ratios

There are 2 Tt and 2 tt. So, Tt:tt = 2:2 = 1:1. The percentage of Tt is $\frac{2}{4}\times100\% = 50\%$ and the percentage of tt is $\frac{2}{4}\times100\% = 50\%$.

Answer:

50 percent Tt, 50 percent tt