ANTHRO 103 Lecture Notes - Lecture 5: Mendelian Inheritance, Punnett Square, Zygosity
22 Sep 2016
School
Department
Course
Professor
Document Summary
Studied philosophy and physics at university: illness made him drop out, sister helped him study. Became a monk so he could get a free education. Pea plant experiments: meticulous methods, published results in1866, work was ignored for 40 years. 7 distinct features: green vs. yellow, wrinkled vs smooth, tall vs short, flower color, flower location, pod shape. Cross-bred plants through generations: traits disappear in one generation, and reappear in the next. His result showed a pattern in proportion of traits: visualized using punnett squares, mendel compared phenotype . He wasn"t aware of genotype : started with f0 parents, true traits = when he bred them, they always looked the same. Generations: f0=parents; true traits, homozygous, f1=1st generation looked like only one of the parents, f2=2nd gen. 3 looked like the grandparent that had disappeared in f1. Phenotype ratio for 2 traits 9:3:3:: round r is dominant. Wrinkled r is recessive: yellow y is dominant.
