Question

the punnett square predicts the ratio of genotypes in the offspring, based on the genotypes of the parents. the punnett square below examines the chance of offspring having freckles, which is a dominant trait.

	f	f
f	ff	ff

based on the punnett square, what is the probability that the offspring will have freckles?

• 25 percent
• 50 percent
• 75 percent
• 100 percent

Explanation:

Step1: Identify dominant trait expression

Freckles are dominant (F), so genotypes FF, Ff show freckles; ff does not.

Step2: Count favorable outcomes

Punnett square has 4 cells: FF, Ff, Ff, ff. Favorable (freckles): FF, Ff, Ff → 3 outcomes.

Step3: Calculate probability

Probability = $\frac{\text{Favorable}}{\text{Total}}$ = $\frac{3}{4}$ = 75%.

Answer:

75 percent