BIO 200LLB Lecture 11: (September 19,2018): Genetics
20 Sep 2018
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If the hypothesis of evolution is correct, then we should see evidence of this in genetics. His paper in 1866 established the field of genetics. Took pollen from the male and place it upon the carpel of another plant . Covered the flower with a cheesecloth bag so a bee could not bring pollen from another. When he did this experiment the plant colors did not blend. The purple color in the plant showed. All tall * all short = all tall. The traits do not blend together in the offspring of two parents. The factors that control a trait maintain a discrete identity when passed from parent to offspring (law of segregation) The dominant traits were always more common than the recessive traits. 1 pure tall (tt), 2 hybrids (tt), 1 short plant(tt) Alternative forms of the same gene (t or t) Tt (heterozygous) t tt (heterozygous) tt (homozygous recessive) He analyzed 2 traits at the same time.
