Question

in pea plants, the trait of producing round peas (r) is dominant to producing wrinkled peas (r). cross a heterozygous round pea plant with a wrinkled pea plant. what is the phenotype ratio of the offspring?
○ 3 round: 1 wrinkled
○ 2 round: 2 wrinkled
○ 2 rr: 2 rr
○ 1 rr: 2 rr: 1 rr

Explanation:

Step1: Identify parent genotypes

Heterozygous round: $Rr$; wrinkled: $rr$

Step2: Set up Punnett square

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

Step3: Determine offspring phenotypes

$Rr$ = round (2 offspring), $rr$ = wrinkled (2 offspring)

Step4: Calculate phenotype ratio

$\frac{\text{round}}{\text{wrinkled}} = \frac{2}{2}$

Answer:

2 round: 2 wrinkled