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

Question

Responses
A 1:1.1:1.
B 1:3.1:3.
C 2:2.2:2.
D 3:1.

Answer 1

When Mendel's first-generation pea plants, which were heterozygous for height (Hh), were allowed to self-pollinate (Hh x Hh), the expected phenotypic ratio of the second generation would be 3 tall plants (H-) to 1 short plant (hh). This is due to the genotypes produced:

• HH (homozygous dominant) - tall
• Hh (heterozygous) - tall
• hh (homozygous recessive) - short

The combination of these results yields the 3:1 ratio. Therefore, the answer is:

D 3:1.