BIOL 2040 Lecture Notes - Lecture 7: Mitochondrion, Cytokinesis, Chloroplast
Document Summary
4 individuals in an ascus- meiotic division is over. Polygenic (quantitative) inheritance: quantitative genetics involves the study of quantitative traits- ones that you need to measure and then quantify the trait of interest, major genes- have a large or major effect on genotypes. The genes for major genes and quantitative genes look the same- the difference arises in the phenotypic traits they produce: there are many genes that contribute to a trait. This group persisted in biometricians- approx 1920 but they felt that mendel"s laws didn"t apply in order to explain quantitative inheritance: typically many genes, but don"t know how many. Lets imagine we follow: if there is genetic variation in a trait you can selectively select the trait you height [n. bk]. want, in a collective study of genes, there is a particular term used- Heritability which is a particular portion of variation of the trait that is due to genes due to segmentation of a gene.
