Question

the characteristic for having dimples (d) is dominant to the characteristic for not having dimples (d). a punnett square showing a cross between a dimpled person and a non - dimpled person is shown below. what percentage of the offspring from this cross will most likely have dimples? a 25% b 50% c 75% d 100%

Explanation:

Step1: Fill the Punnett - square

The top row has alleles D and d from the dimpled parent, and the left - hand column has alleles d and d from the non - dimpled parent. Filling the Punnett square gives us Dd, Dd, dd, dd.

Step2: Determine the genotypes for dimples

The genotype for having dimples is Dd or DD. Here, we have 2 Dd (dimpled) and 2 dd (non - dimpled) out of 4 offspring.

Step3: Calculate the percentage

The number of dimpled offspring is 2 out of 4. The percentage is $\frac{2}{4}\times100\% = 50\%$.

Answer:

B. 50%