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ICE Princess25 [194]
3 years ago
14

Round (R) seed shape is dominant to wrinkled (r) seed shape in pea plants. If an RR plant is crossed with an rr plant, what is t

he frequency of phenotypes in the F2 generation? a. All wrinkled seeds b. All round seeds c. 1/4 RR, 1/2 Rr, 1/4 rr d. 3 round seeds, 1 wrinkled seed e. None of the above
Biology
1 answer:
melamori03 [73]3 years ago
4 0

Answer:

The correct answer is b. All round seeds

Explanation:

If an RR plant is crossed with an rr plant than all the phenotype will produce round seed and the frequency of the Round seed plant to wrinkled seed plant would be 4:0.

                       R     R

                  r   Rr    Rr

                  r   Rr    Rr

So all the phenotypes will be heterozygous dominant for the round seed which means that all phenotypes will have a single dominant allele for round seed which is enough to express round seeds in the phenotypes.

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