Question
When Mendel’s first-generation pea plants (Hh) were allowed to self-pollinate (Hh x Hh), the ratio of tall (dominant) to short (recessive) plants in the second generation was
Responses
A 1:1.
B 1:3.
C 2:2.
D 3:1.
Responses
A 1:1.
B 1:3.
C 2:2.
D 3:1.
Answers
GPT-4o mini
When Mendel's first-generation pea plants (Hh) were allowed to self-pollinate (Hh x Hh), the expected ratio of tall (dominant) to short (recessive) plants in the second generation is 3:1. This is due to the following Punnett square results:
- HH (homozygous dominant) - Tall
- Hh (heterozygous) - Tall
- Hh (heterozygous) - Tall
- hh (homozygous recessive) - Short
Thus, there are 3 tall plants to every 1 short plant, leading to the ratio of **3:1**.
The correct answer is **D: 3:1**.
- HH (homozygous dominant) - Tall
- Hh (heterozygous) - Tall
- Hh (heterozygous) - Tall
- hh (homozygous recessive) - Short
Thus, there are 3 tall plants to every 1 short plant, leading to the ratio of **3:1**.
The correct answer is **D: 3:1**.