Final answer:
Heritability is the fraction of phenotype variation that can be attributed to genetic differences among individuals in a population, reflecting the amount of differences in a population attributable to genetic influences. The greater the heritability, the more susceptible the population is to evolutionary forces.
Step-by-step explanation:
Heritability is the fraction of phenotype variation that we can attribute to genetic differences among individuals in a population. It reflects the amount of differences in a population attributable to genetic influences. The greater the heritability, the more susceptible the population is to the evolutionary forces that act on heritable variation.
Heritability is the term that defines the fraction of phenotype variation due to genetic differences in a population, affecting its susceptibility to evolutionary forces like natural selection.
The number that reflects the amount of differences in a population attributable to genetic influences is known as heritability. Heritability is the fraction of phenotype variation in a population that can be attributed to genetic differences among individuals. This measure is significant because the greater the heritability, the more a population's phenotypic variation is susceptible to evolutionary forces, such as natural selection, which act on heritable traits. Therefore, when considering genetic influences on a population over time, heritability is a key concept in understanding the genetic basis of population-wide traits and whether specific traits have a genetic basis.