Question

13 multiple choice 1 point in garden peas, round seeds (r) is dominant over wrinkled seeds (r). a cross was made between two heterozygous round seeded plants. which should be the expected genotypic ratio in the seeds produced by this cross? 1rr : 1rr 1rr : 2rr : 1rr 1rr : 1rr : 1rr 3rr : 1rr

Explanation:

Step1: Identify Genotypes

Heterozygous round - seeded plants have genotype \(Rr\). So we are crossing \(Rr\times Rr\).

Step2: Use Punnett Square

The Punnett square for \(Rr\times Rr\) is:

	\(R\)	\(r\)
\(r\)	\(Rr\)	\(rr\)

Counting the genotypes: \(RR\) appears 1 time, \(Rr\) appears 2 times, and \(rr\) appears 1 time. So the genotypic ratio is \(1RR:2Rr:1rr\).

Answer:

\(1RR:2Rr:1rr\) (the second option in the multiple - choice list)