Question

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.
(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%**