L23(1) PDF - Genetics Notes

studied The Phenotypic ratio of the F2 offspring follows the 9:3:3:1 ratio due to Independent Assortment! As a consequence, new genetic principles were discovered! Rapid reproduction is super advantageous to tracking inheritance patterns across generations! Both examples drawn from Morgan’s Drysophi...

studied The Phenotypic ratio of the F2 offspring follows the 9:3:3:1 ratio due to Independent Assortment! As a consequence, new genetic principles were discovered! Rapid reproduction is super advantageous to tracking inheritance patterns across generations! Both examples drawn from Morgan’s Drysophila Studies Mendel’s Studies 12:4 = 3:1 (when simplified) 2 All 3 Follow Mendel’s 1st Law - But Not All of Them Follow the 2nd Law! Genetic Crosses: These 2 Genes are behaving as if they were a single gene! I know we haven’t explained exactly what recombination is yet, but for now just know that it occurs in this kind of nonrandom assortment! REMEMBER: Gene names/letters can come from the phenotype of the Dominant gene or the recessive gene Instead of “Vg” as the gene abbreviation for wing shape, use “V” to avoid confusion B/b is denoted by the black band on the chromosome, while V/v is denoted by the blue band - colors don’t represent genotype, just the gene! An exchange of genetic material occurred between the inner chromosomes. In this example, the cross over point is between the 2 genes which is reasonable given their distance