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
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

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

Step2: Count favorable genotypes

Punnett square has 4 cells: FF, Ff, Ff, ff. Genotypes with freckles: FF, Ff, Ff (3 out of 4).

Step3: Calculate probability

Probability = $\frac{\text{Number of favorable outcomes}}{\text{Total outcomes}}$ = $\frac{3}{4}$ = 75%.

Answer:

75 percent