HISC45H3 Lecture Notes - Lecture 1: Pleiotropy, Quantitative Genetics, Mt-Nd1
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Bioc15 class 5 sept 20, 2017 (notes copyright hasenkampf 2017) Today, i want to look at the last part of chapter 2 that deal with two genes whose protein. Products may interact with each other to determine an organismal phenotype: review mendel"s ratios. F1 selfcross yields f2 genotypic ratio of 1/4(aa) 2/4(aa) 1/4(aa) F2 phenotypic ratio of 1/4(aa) 2/4(aa) 1/4(aa) (if co or incomplete dominance) F2 phenotypic ratio of a_ and aa (if dominant/recessive alleles) If two genes are being studied and they sort independently and do not interact then. Aabb x aabb > aabb (f1) this dihybrid generates gametes in a 1:1:1:1 ratio of ab, ab, ab and ab. A_b_ [aabb (1/16); aabb (2/16); aabb (2/16); aabb (4/16)] A_ bb [aabb (1/16); aa b_ [aabb (1/16); aabb [aabb (1/16] If the dihybrid is selfcrossed, then the genotypes generated can be predicted using a punnett square.
