The process of exposure to an environmental stress or pathogen causes mutations to occur so that these mutations can increase the fitness of the population and make it survive.
a) true
b) false

Which statements describe incomplete dominance? traits are usually dominant. traits are neither dominant nor recessive. offspring exhibit an intermediate form of alleles from the parents. both alleles, one from each parent, are expressed in offspring. incomplete dominance involves the interaction of two alleles.

Variety of living organisms; includes genetic, species, and ecological types.

Freckles are a dominant trait in humans. both of the girls have the genotype ff for freckles. if either one marries a man with no freckles, what are the chances that their children will have freckles?