Question

two plants are heterozygous for seed shape and have round seeds. if the two plants are crossed, what is the probability that the offspring will have wrinkled seeds?
25 percent
50 percent
75 percent
100 percent

Explanation:

Step1: Define allele notation

Let $R$ = dominant (round seed), $r$ = recessive (wrinkled seed)

Step2: Identify parent genotypes

Both parents are heterozygous: $Rr$

Step3: Set up Punnett square

	$R$	$r$
$r$	$Rr$	$rr$

Step4: Calculate wrinkled seed probability

Wrinkled seeds require $rr$. Only 1 out of 4 genotypes is $rr$.
Probability: $\frac{1}{4} = 25\%$

Answer:

25 percent