lab exam review 7

lab exam review 7 - A person who can taste Sodium Benzoate,...

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BIOL 112 Laboratory Review THEORY OF EVOLUTION:  Individuals with traits that aid survival are more likely to survive and pass the favored  traits to the next generation. These traits are called genes and genetic variation is a key  factor in evolution.  Evolution results from changes in allele or gene frequencies in populations.  Scientists who study evolution in living populations look at the genetic variation of the  individuals that constitute that population. This study is called  population genetics The five tenets of Hardy-Weinberg Equilibrium a. Large population size, b. No immigration or emigration,  c. No genetic mutations, d. Random mating, e. No natural selection.  Populations that do not meet these assumptions are not in Hardy-Weinberg equilibrium.  Selection and Genetic drift.  Allele frequencies: p+q = 1 Hardy-Weinberg Equilibrium: p2+2PQ+q2 = 1
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Unformatted text preview: A person who can taste Sodium Benzoate, thiourea or PTC is either homozygous dominant or heterozygous. On the other hand, a person who cannot taste them is homozygous recessive. Most people have a normal set of genes for hemoglobin (HbA). If one mutated gene (HbS) and one normal gene (HbA) are inherited, a person has abnormal hemoglobin. If two mutated genes (HbS) are inherited, then the person has sickle cell anemia. Johannesburg gets the anti-malarial funding since it is more susceptible to a Malarial pandemic. We have come to this conclusion based on the percentage of heterozygous individuals. Types of genetic drift: Genetic bottleneck and Founder effect. Heterozygous genotype cloaks recessive deleterious alleles and prevents them from being wiped out....
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This note was uploaded on 04/03/2012 for the course BIOL 112 taught by Professor Vaughn during the Fall '08 term at Texas A&M.

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