Single Answer MCQ
Q-00019406
In pea plants, round seeds (R) are dominant over wrinkled seeds (r). What would be the expected phenotypic ratio of the offspring from a cross between a heterozygous round seed plant and a homozygous wrinkled seed plant?
1
1:1
2
3:1
3
1:2:1
4
2:1
Answer and Solution
Answer
A. 1:1
Solution:
Crossing a heterozygous round seed plant (Rr) with a homozygous wrinkled seed plant (rr) results in 50% round seeds (Rr) and 50% wrinkled seeds (rr). This produces a phenotypic ratio of 1:1.
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