Good genes hypothesis

Definition

The good genes hypothesis suggests that certain traits are favored in mate selection because they indicate superior genetic quality. These traits increase the likelihood of offspring survival and reproduction.

5 Must Know Facts For Your Next Test

1. The hypothesis is often studied in the context of sexual selection and mate choice.
2. Traits indicating 'good genes' can include physical characteristics, behaviors, or other phenotypic expressions.
3. Good genes can confer advantages such as disease resistance, better metabolism, or more efficient resource use.
4. Females may prefer males with these traits because their offspring are likely to inherit these advantageous qualities.
5. Empirical evidence for the good genes hypothesis has been observed in various species, including birds, fish, and mammals.

Review Questions

• What does the good genes hypothesis propose about mate selection?
• How do 'good genes' benefit offspring according to this hypothesis?
• Can you name a type of trait that might be considered an indicator of good genes?

Related terms

Sexual Selection: The process by which certain traits increase an individual's chances of mating and reproducing based on attractiveness to potential mates

Mate Choice: The criteria individuals use to select their partners for reproduction

Phenotype: The observable characteristics or traits of an organism resulting from the interaction of its genotype with the environment