BIOSC 0150 Lecture Notes - Lecture 34: Quantitative Trait Locus, Dairy Cattle, Human Height
Document Summary
Most traits are complex (controlled by many genes and the environment): more than 10 genes and the environment control skin pigmentation. This is the case for complex traits o. You can change your phenotype by environmental effects. Complex traits are often quantitative because they are measured along a continuum with small intervals between individuals: qualitative trait. Color of mendel"s pea plant seeds: quantitative. There is a range of different traits and you can put a number on it. Human height, number of eggs laid by hens, milk production in dairy cow, yield per acre of grain o. Blood pressure, obesity, diabetes, and depression are complex traits. o. There is a genetic influence but there are also environmental factors that can change this. For traits that are controlled by many genes, the phenotype of the offspring is the average of the parental phenotypes. o. True breading red wheat + true breading white wheat = orange wheat.