Answer:
heterozygote advantage
Explanation:
An heterozygote advantage is when a heterozygous genotype has a greater aptitude than homozygous genotypes. The specific case of heterozygous advantage over a single locus is known as overdominance. In short, this happens when a disorder is present in a heterozygous population, but this disorder has a great benefit for the genes present in the body.
The rattle on a rattlesnake is a defense mechanism it’s used to warn predators when aggravated