ANT 301 Chapter Notes - Chapter 4: Quantitative Trait Locus, Sickle-Cell Disease, Polydactyly
Document Summary
Mendel- resolved the question of heredity through his study of pea plants; concept of segregation, recessiveness and dominance. Selective breeding- a practice whereby animal or plant breeders choose which individual animals or plants will be allowed to mate based on the traits (such as coat color or body size) they hope to produce in offspring. Animals or plants that don"t have the desirable traits aren"t allowed to breed. Hybrids- offspring of parents who differ from each other with regard to certain traits or certain aspects of genetic makeup; heterozygotes. Principle of segregation- genes (alleles) occur in pairs because chromosomes occur in pairs. During gamete formation, the members of each pair of alleles separate, so that each gamete contains one member of each pair. Recessive- describing a trait that isn"t expressed in heterozygotes; also refers to the allele that governs the trait.
