The Smith children, although genetically related, all show slight variations in the colour of their skin. This is most likely the result of:
A) single genotype expression
B) cell division
C) polygenic effects
D) dominant gene effects

Question

Quizplus · Accepted Answer

Polygenic effects occur when a trait is controlled by multiple genes, each contributing to the phenotype in an additive and continuous manner. Skin color is a polygenic trait, meaning that it is influenced by several genes that work together to determine the final color. Therefore, the slight variations in skin color observed in the Smith children can be attributed to polygenic effects.

The Smith Children, Although Genetically Related, All Show Slight Variations