Study notes for lecture 6

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Department
Human Biology
Course
HMB265H1
Professor
Stephen Wright
Semester
Winter

Description
Lecture 06: Extensions of Mendelian genetics (Part 2) Mendelian genetics extended - Law of segregation still holds o But genotype-phenotype relationship modified o Genotype filtered through pleitropy, penetrance, espressivity, environment - Law of independent assortment applicable to multihybrid crosses Further chicken crosses - Cross rose comb and pea comb o F1 walnut o Cannot self animals, so cross F1 and o F2 walnut, rose, pea, and single in 9:3:3:1 Fourth phenotype Walnut is double heterzygote since parents were inbred Not monohybrid cross, with 3 phenotypes in 1:2:1 But dihybrid cross, with 2 genes influencing 1 phenotype Complementation - Cross purebred white and purebred white o F1 blue o F2 blue and white in 9:7 7 = 3 + 3 + 1 2 genes, 2 phenot
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