BIOL 1500 Lecture Notes - Lecture 10: Punnett Square, Gregor Mendel, Plant Breeding
6 Oct 2016
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Document Summary
Gregor mendel was a 19th century austrian monk, considered the founder of modern genetics. Pea plant were an idea plant to study because: easy to grow, develop quickly, produce many off-springs, have many traits, easy to control plant mating (self-fertilization or cross-fertilization) Hand-pollinating plants allowed mendel to control plant breeding experiments. Self-fertilizing and cross- fertilizing in different combinations allowed mendel to deduce the principles of inheritance. Steps: pollen from tall plant is transferred to flower on short plant, pods contain the offspring (seeds) resulting from the cross, seeds are planted, each seed develops into a tall or short plant. True- breeding plants produce offspring identical to themselves. Dominant alleles exert their effects whenever they are present: crossing a yellow seed plant with a green seed plant always yields some yellow seeds. A recessive allele is one whose effect is masked if a dominant allele is also present.
