Question

question 25
the genotypic ratio resulting from a monohybrid cross between parents rr and rr is:

1. 1:2:1
2. 3:1
3. 9:1:1:3
4. 9:3:3:1

Explanation:

Step1: Set up the Punnett square

For a cross between \(Rr\) and \(Rr\), the possible gametes are \(R\) and \(r\) from each parent.

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

Step2: Count the genotypes

• \(RR\): \(1\)
• \(Rr\): \(2\)
• \(rr\): \(1\)

Answer:

1. \(1:2:1\)