In pea plants, tall plants (T) are dominant over short plants (t). If a heterozygous tall pea plant is crossed with a homozygous recessive short pea plant, what percentage of the offspring is expected to be tall.

Question

(HINT: use a Punnett square to help you with this question)
(1 point)
• 75%
• 0%
• 50%
• 25%

Answer 1

To solve this problem, we can set up a Punnett square to determine the genotypes of the offspring resulting from the cross between a heterozygous tall pea plant (Tt) and a homozygous recessive short pea plant (tt).

Here are the genotypes of the parents:

• Parent 1 (Heterozygous Tall): Tt
• Parent 2 (Homozygous Recessive Short): tt

Now, we can set up the Punnett square:

| | T | t | |---|---|---| | t | Tt | tt | | t | Tt | tt |

Now, let's analyze the results:

• Possible offspring genotypes:
  • Tt (tall)
  • tt (short)

From the Punnett square:

• 2 out of 4 offspring (or 50%) will be Tt (tall).
• 2 out of 4 offspring (or 50%) will be tt (short).

Thus, the percentage of the offspring that are expected to be tall is 50%.

Therefore, the answer is: 50%