A tall, heterozygous pea plant is crossed with another tall, heterozygous pea plant. What is the probability that an offspring will be a short plant?(1 point)

Question

Responses

50%
50%
75%
75%
25%
25%
0%

Answer 1

In pea plants, the allele for tallness (T) is dominant, while the allele for shortness (t) is recessive. When you cross two heterozygous tall pea plants (Tt x Tt), you can use a Punnett square to determine the probabilities of the offspring's traits.

The possible allele combinations from this cross are:

• TT (homozygous tall)
• Tt (heterozygous tall)
• Tt (heterozygous tall)
• tt (homozygous short)

This gives us the following genotypic ratios:

• 1 TT: 2 Tt: 1 tt

Now translated into phenotypes:

• Tall (TT and Tt): 3 (75%)
• Short (tt): 1 (25%)

Thus, the probability that an offspring will be a short plant (tt) is 25%.