Evolution - having the disadvantageous allele. For example,...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Evolution: Modern Synthesis Terms Adaptation - A genetically controlled trait that increases an individual's fitness. Alleles - Variations of a given gene. Balanced Polymorphism - A situation in which it is beneficial for a population to maintain two different alleles creating different phenotypes within the population. DNA - Abbreviation for deoxyribonucleic acid, the genetic material of most organisms. Fitness - The probability that an individual will contribute its genes to the next generation Gene pools - All of the genes of all of the individuals in a population make up a gene pool. Genotype - The genetic make-up of an individual. Compare with phenotype. Heterozygote Advantage - A situation in which a single disadvantageous allele is not selected out of a population, because, when a person is heterozygous for that allele (the person has one disadvantagoues allele and one normal allele), the person gains some sort of local advantage by
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: having the disadvantageous allele. For example, the allele for sickle-cell anemia offers resistance to malaria. If a person in an area high in malaria is heterozygous for sickle-cell anemia, the resistance they gain to malaria outweighs the disadvantage of having heterozygous sickle-cell anemia. A person with two sickle-cell anemia cells in such a region is will not have a greater advantage, even if they are completely resistant to malaria. What's the use of being resistant to malaria if you're blood can't carry oxygen? Independent assortment - The inheritance of different genes independently of each other. Lamarckism - The theory of evolution stating that species change over time and that this change occurs through use and disuse and the inheritance of acquired traits....
View Full Document

Ask a homework question - tutors are online