BIOL239 Chapter Notes - Chapter 1: Gamete, Product Rule, Selective Breeding

• School: University of Waterloo
• Department: Biology
• Course: BIOL239
• Professor: Christine Dupont

Document Summary

Background: the historical puzzle of inheritance: a(cid:396)tifi(cid:272)ial sele(cid:272)tio(cid:374) (cid:449)as the fi(cid:396)st applied ge(cid:374)eti(cid:272) te(cid:272)h(cid:374)i(cid:395)ue. Artificial selection: purposeful control over mating by choice of parents for the next generation: desi(cid:396)a(cid:271)le t(cid:396)aits so(cid:373)eti(cid:373)es disappea(cid:396) and reappear, (cid:1006) e(cid:396)(cid:396)o(cid:396)s a(cid:271)out he(cid:396)edit(cid:455) (cid:449)e(cid:396)e (cid:373)isleadi(cid:374)g. One parent contributes most to an offspring"s inherited features. People thought that there was a miniature human inside the sperm. Another deceptive notion was the concept of blended inheritance: me(cid:374)del"s e(cid:454)pe(cid:396)i(cid:373)e(cid:374)t (cid:449)ould p(cid:396)o(cid:448)e these a(cid:396)e e(cid:396)(cid:396)o(cid:396)s, me(cid:374)del (cid:272)hose ga(cid:396)de(cid:374) peas as his e(cid:454)pe(cid:396)i(cid:373)e(cid:374)tal o(cid:396)ga(cid:374)is(cid:373) (cid:271)e(cid:272)ause the(cid:455) (cid:449)e(cid:396)e self fe(cid:396)tilizi(cid:374)g. Height and skin colour in humans: me(cid:374)del used pu(cid:396)e-breeds so that the offspring could carry specific parental traits that remain constant from generation to generation, c(cid:396)oss-fertilization of pure breeds result in hybrids. Genetic analysis according to mendel: mo(cid:374)oh(cid:455)(cid:271)(cid:396)id (cid:272)(cid:396)osses (cid:396)e(cid:448)eal u(cid:374)its of i(cid:374)he(cid:396)ita(cid:374)(cid:272)e a(cid:374)d the la(cid:449) of seg(cid:396)egation. Monohybrid cross: matings in individuals that only differ only in one trait. All the f1 progeny resemble one of the parental strains.