BIOLOGY 171 Lecture Notes - Lecture 7: Sex Linkage, Allosome, Reciprocal Cross
Document Summary
Generalization that genes are located on chromosomes and that the behavior of chromosomes during meiosis and fertilization accounts for inheritance. Interaction between genes that modifies the phenotypic expression of genotypes. Unequal effects of the environment on different genotypes, results in different phenotypes. Measure of the genetic divergence between species or between populations within a species. Populations with many similar genes have small genetic distances. This indicates that they are closely related and have a recent common ancestor. Describes genes that are sufficiently close together in the same chromosome that they do not assort independently. The physical distance between two loci dictates the frequency of crossover between loci. The smaller the distance, the less chance of crossover. Progeny in which the alleles are present in the same combination as the present in a parent. A breeding experiment in which the mother"s and father"s phenotypes are the reverse of that examined in a previous breeding experiment.
