Question

A short paragraph explaining how freckles is passed from parent to offspring

Answer 1

Freckles are a trait that tends to run in families because of inherited variation in the MC1R gene and other pigment-related genes, but they are not determined by a single, simple rule. Variants in MC1R make skin more likely to produce pheomelanin and respond to ultraviolet light by forming small pigmented spots, so a child who inherits those variants from one or both parents has a higher chance of developing freckles—especially after sun exposure. Expression is variable (incomplete penetrance) and influenced by other genes and the environment, so inheriting the predisposition increases the likelihood but does not guarantee freckles.