dimples is a dominant trait (d). the punnett square shows a cross for this trait between two parents. what…

dimples is a dominant trait (d). the punnett square shows a cross for this trait between two parents. what is the probability that the offspring will have dimples? 25% 50% 75% 100%

dimples is a dominant trait (d). the punnett square shows a cross for this trait between two parents. what is the probability that the offspring will have dimples? 25% 50% 75% 100%

Answer

Explanation:

Step1: Fill the Punnett - square

The possible genotypes of the offspring are determined by combining the alleles from each parent. When one parent has alleles (D) and (d) and the other has (d) and (d), the Punnett - square results in genotypes (Dd), (Dd), (dd), (dd).

Step2: Determine the dominant - trait genotypes

The dominant trait for dimples is represented by (D). Genotypes with at least one (D) allele ((Dd)) will show the dimple trait. Out of the 4 possible genotypes ((Dd), (Dd), (dd), (dd)), 2 have the (D) allele.

Step3: Calculate the probability

The probability (P) of an event is calculated as (P=\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}). Here, the number of favorable outcomes (offspring with dimples, i.e., (Dd) genotypes) is 2, and the total number of outcomes is 4. So (P = \frac{2}{4}=0.5 = 50%).

Answer:

50%