Question

A tall pea plant with round seeds (TTRR) is crossed with a short pea plant with wrinkled seeds (ttrr). The F₁ generation will be:

• A. 25% tall with round seeds
• B. 50% tall with wrinkled seeds
• C. 75% tall with wrinkled seeds
• D. 100% tall with round seeds

Hint:

In genetic crosses, the dominant trait is always expressed in the offspring if at least one dominant allele is present.

Answer 1

The Correct Option is D

Step 1: Trait Identification. - Tall (T) dominates short (t), and round (R) dominates wrinkled (r).
- Parental genotypes: TTRR (tall, round) and ttrr (short, wrinkled).
Step 2: F₁ Generation Analysis. - F₁ inherits one allele from each parent.
- All F₁ plants have the TtRr genotype, indicating heterozygosity for both traits.
Step 3: Summary. Given dominance of tall (T) and round (R), all F₁ plants are tall with round seeds.