Type of Selection How It Works Stabilizing Directional Disruptive What is often the result of sexual selection? What is the difference between and Give an intrasexual selection intersexual selection? example of each type of selection. Explain two ways in which genetic variation is preserved in a population. Discuss what is meant by and use sickle-cell anemia as an example. heterozygote advantage, Finally, give four reasons why natural selection cannot produce perfect organisms.
Type of Selection How It Works Stabilizing Directional Disruptive What is often the result of sexual selection? What is the difference between intrasexual selection and intersexual selection? Give an example of each type of selection. Explain two ways in which genetic variation is preserved in a population. Discuss what is meant by heterozygote advantage, and use sickle-cell anemia as an example. Finally, give four reasons why natural selection cannot produce perfect organisms.