Scott and Darpa are siblings who have the same parents. Scott has heavy, straight eyebrows, whereas Darpa has thinner, arched eyebrows. These differences in eyebrow shape are due to different _____ that each sibling received from their parents.
A) nurture
B) alleles
C) gender
D) advice

Question

Quizplus · Accepted Answer

Eyebrow shape is an inherited trait controlled by alleles, and the siblings' differences in shape suggest that they received different combinations of alleles from their parents. Nurture (environmental factors) such as grooming habits or styling choices may influence the appearance of eyebrows, but they would not cause a fundamental difference in shape. Gender and advice are not relevant to this trait.

Scott and Darpa Are Siblings Who Have the Same Parents