Question

1. the parent pea plants are both select....

• tall
• short
• of medium height

1. what chance is there that an offspring will be short?

a. 0 out of 4
b. 1 out of 4
c. 2 out of 4
d. 3 out of 4

Explanation:

Step1: Analyze dominant - recessive alleles

In pea plants, assume T is the dominant allele for tallness and t is the recessive allele for shortness. The parents have alleles T and t each as seen from the Punnett - square setup. Since they have the genotype Tt, and the presence of the dominant T allele makes the plant tall, the parents are tall.

Step2: Determine offspring genotypes and phenotypes

The Punnett - square shows the possible genotypes of the offspring: TT, Tt, Tt, tt. The genotype tt represents the short - phenotype. There is 1 tt out of 4 possible genotypes.

Answer:

1. tall
2. B. 1 out of 4