ANTH 1001 Chapter : Brophy Anth 1001
Document Summary
Principle of independent assortment: genes that code for different traits assort independently of each other during gamete formation, the genes controlling different traits are inherited independently of one another in a process called random assortment. Linked genes: genes that are located on the same chromosome-usually remain together during meiosis, do not independently sort. Mendel"s work: 1866 -mendel published his results, mendelian traits- controlled by allels at one genetic locus, one trait = one gene, 1902 brachydactyly- first mendelian trait identified in humans. Dominant recessive misconceptions: dominance and recessiveness are all or nothing situations, dominant alleles are "stronger" or "better, dominant alleles are more common because natural selection favors them. "alternative forms of genes account for variations in inherited characteristics: law of segregation- traits retain their separate identities through generation, not blended together. Pedigrees: determine mode of inheritance, risk of genetic disease, pedigree chart- diagram of mating and offspring in a family over generations.
