BIOLOGY 151 Lecture Notes - Lecture 40: Epistasis, Probability Distribution, Heritability
Document Summary
All of nearly all traits are influenced by many genes. Gene interaction- a single trait is controlled by 2 or more genes, each of which has 2 or more alleles. Purple or white flowers, red or white eyes. Continuous or quantitative: show continuous variation over a range of phenotypes. Height, skin color, number of apples on a tree. Ex. skin color- two people with the same genetic makeup for skin color could still look different because staying in the sun longer making their skin darker. Two mice fed the exact same diet, one is fat one is skinny. Regression toward the mean: kids of parents will exhibit heights closer to the mean, if parents are shorter then kids will be taller, or if they are taller then kids will be shorter. Heritability: what aspect of every trait comes from your genetics. Greenhouse- constant environment, so any differences in plants would be a result of genetics 100% heritability.
