Question
A farmer decides to cross a heterozygous tall pea plant (Tt) with a homozygous tall pea plant (TT). What percent of the offspring will most likely be tall?
a. 50%
b. 100%
Selected:c. 75%This answer is incorrect.
d. 25%
a. 50%
b. 100%
Selected:c. 75%This answer is incorrect.
d. 25%
Answers
GPT-4o mini
To determine the percentage of tall offspring when crossing a heterozygous tall pea plant (Tt) with a homozygous tall pea plant (TT), we can set up a simple Punnett square.
1. The possible alleles from the Tt parent are T and t.
2. The possible alleles from the TT parent are both T (since it is homozygous).
When we set up the Punnett square, we get:
| | T | T |
|---|---|---|
| T | TT | TT |
| t | Tt | Tt |
From this Punnett square, we see the following genotypes among the offspring:
- 2 TT (homozygous tall)
- 2 Tt (heterozygous tall)
All the offspring (4 out of 4) will have at least one dominant T allele, so they will all be tall.
Thus, the percentage of tall offspring is 100%.
So the correct answer is:
b. 100%
1. The possible alleles from the Tt parent are T and t.
2. The possible alleles from the TT parent are both T (since it is homozygous).
When we set up the Punnett square, we get:
| | T | T |
|---|---|---|
| T | TT | TT |
| t | Tt | Tt |
From this Punnett square, we see the following genotypes among the offspring:
- 2 TT (homozygous tall)
- 2 Tt (heterozygous tall)
All the offspring (4 out of 4) will have at least one dominant T allele, so they will all be tall.
Thus, the percentage of tall offspring is 100%.
So the correct answer is:
b. 100%