LIFESCI 15 Lecture Notes - Lecture 3: Disruptive Selection, Glyptodont, Allele Frequency
Document Summary
Every generation, let population die until you have last 20% left, then have then breed and repeat. After 60 generations, flies could last for 160 hours without food. Flies started to be born differently (greasy and with less eggs) to prepare for starvation. Take away message: species are not immutable; we can watch them change in nature or even cause them to change. The gradual process in which something changes into a different and more complex or better form. A change in allele frequencies within a population. Gene- a section of dna instructing the body how to produce a trait through the creation of proteins. Allele- one variant or version of a gene (we get one from each parent) Individual can be homozygous dominant (bb), homozygous recessive (bb), or heterozygous (bb) Allele frequency in a population can be measured by counting the number of each allele in the group and taking the fraction out of the whole.
