BIOL 1202 Lecture Notes - Lecture 1: Reproductive Isolation, Meiosis, Genotype Frequency
Document Summary
Genetically, there are four distinct lineages, but the 13 species are currently classified among three genera. The first lineage to diverge from the ancestral lineage was the warbler finch (genus certhidea). Next to diverge was the vegetarian finch (genus camarhynchus), followed by five tree finch species (also in genus camarhynchus) and six ground finch species (genus geospiza). Molecular analysis in 1999 shows, the vegetarian finch is genetically no more similar to the tree finches than it is to the ground finches, despite the fact that it is placed in the same genus as the tree finches. What is the allele frequency for the dominant allele: 0. 99 (1-. 0001, phenylketonuria (pku) is an autosomal recessive genetic disorder. The frequency of homozygotes with this disorder is 0. 0001. What percentage of the population is heterozygous: 0. 02 (2x1x1/100), 1-0. 02= 1. 98, a high proportion of the cats on key west have extra toes (polydactyly).
