Which concept describes the genetic contribution to trait variation within a population?

Which concept describes the genetic contribution to trait variation within a population?

• A. Genotype
• B. Phenotype
• C. Genome
• D. Heritability

Answer: (D)

Heritability describes the genetic contribution to trait variation within a population. It’s a population-level statistic that estimates how much of the observed differences in a trait among individuals in a given environment are due to genetic differences. It doesn’t tell us about a single person or how a trait develops in an individual, and it depends on the environment—changing the environment can change the estimate. Values range from 0 to 1, with higher values indicating genetics accounts for more of the observed variation. To contrast, genotype is the specific set of genes an individual carries, phenotype is the observable trait, and genome is the complete set of genetic material. The idea here is about how much of the variation seen across a population is attributable to genetic differences, not about any one person's genes or outcomes.

Heritability describes the genetic contribution to trait variation within a population. It’s a population-level statistic that estimates how much of the observed differences in a trait among individuals in a given environment are due to genetic differences. It doesn’t tell us about a single person or how a trait develops in an individual, and it depends on the environment—changing the environment can change the estimate. Values range from 0 to 1, with higher values indicating genetics accounts for more of the observed variation.

To contrast, genotype is the specific set of genes an individual carries, phenotype is the observable trait, and genome is the complete set of genetic material. The idea here is about how much of the variation seen across a population is attributable to genetic differences, not about any one person's genes or outcomes.