A hybrid pea plant with round seeds is crossed with a plant with wrinkled seeds. Which trait is more likely to appear in offspring, wrinkled seeds or round seeds?

Question

(5 Points)

Round seeds, 75%

Wrinkled seeds, 75%

Each trait is equally likely; 50% wrinkled seeds; 50% round seeds.

None of the above

Answer 1

To determine which trait is more likely to appear in the offspring of a hybrid pea plant with round seeds (genotype Rr) crossed with a plant with wrinkled seeds (genotype rr), we can use a Punnett square.

• Round seeds (R) are dominant to wrinkled seeds (r).
• The hybrid plant's genotype is Rr (round seeds).
• The other plant's genotype is rr (wrinkled seeds).

Setting up the Punnett square:

       R      r
    ----------------
  r |   Rr   |   rr   |
    ----------------
  r |   Rr   |   rr   |
    ----------------

From the Punnett square, we have:

• 2 squares with Rr (round seeds)
• 2 squares with rr (wrinkled seeds)

This gives us:

• 50% Rr (round seeds)
• 50% rr (wrinkled seeds)

Thus, each trait is equally likely to appear in the offspring, with a 50% chance for round seeds and a 50% chance for wrinkled seeds.

The correct answer is: Each trait is equally likely; 50% wrinkled seeds; 50% round seeds.