BIOL 1010 Lecture Notes - Lecture 5: Seed Saving, Plant Breeding, Mutation Breeding
5 Nov 2018
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Document Summary
The process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits (characteristics) by choosing which typically animal or plant males and females will sexually reproduce and have o spring together. The wild have their seeds on top of a stalk that spontaneously shatters, dropping the seeds to the ground where they can germinate. this also made them di cult for humans to gather. Humans unknowingly selected for those cereals with a single-gene mutation that prevents shattering is lethal in the wild (because the seeds fail to drop), but conveniently concentrates the seeds for human gatherers. Sheeps selected to lose their outer bristly hair (kemp) and not shed their soft inner hairs (wool). Most domestic animals, including even recently domesticated trout, have smaller brains and less acute sense organs than do their wild ancestors. Corn as we know it was domesticated from teosinte at least 6000 years ago by native.
