Question

in pea plants, the allele for round seed shape, r, is completely dominant to the allele for wrinkled seed shape, r. complete the punnett square showing the genotypes possible among the offspring when two heterozygous individuals are crossed. use the information from the punnett square to answer the second question.

punnett square with r, r columns and r, r rows, some cells with dropdowns

in this cross between two heterozygous pea plants, what are the chances that an offspring with wrinkled seeds will be produced?
○ 1%
○ 75%
○ 50%
○ 25%

Explanation:

Step1: Determine the gametes

Heterozygous pea plants have genotype \(Rr\). Each parent can produce two types of gametes: \(R\) and \(r\).

Step2: Construct the Punnett square

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

Step3: Analyze the genotypes

The genotypes of the offspring are \(RR:Rr:rr = 1:2:1\). Wrinkled seeds have genotype \(rr\).

Step4: Calculate the probability

The probability of \(rr\) (wrinkled seeds) is \(\frac{1}{4}= 25\%\).

Answer:

D. 25%