VCU BIOL 152 - Exam 1 Study Guide (4 pages)

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Exam 1 Study Guide



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Exam 1 Study Guide

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Pages:
4
Type:
Study Guide
School:
Virginia Commonwealth University
Course:
Biol 152 - Intro to Biological Science Ii
Intro to Biological Science Ii Documents

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BIOL 152 1st Edition Exam 1 Study Guide Lectures 1 12 Asexual Reproduction Single parent passes all of its genes to offspring Offspring is a clone Sexual Reproduction Each parent passes half of its genes Genetic Variation arrives by chance 1 Mutation Generates new variation New alleles are formed Somatic Mutation occurring in the body s tissues only affects one cell Germ line occurring in the reproductive cells passed onto the next generation affects all the cells and descendants and is more important Harmful Mutations Random changes to an organism Neutral Mutations No effect on the organism occur in the genome that is not important Advantageous Mutations Mutation that is beneficial in terms of survival or reproduction 2 Recombination Shuffles mutations to create new combinations of mutations New alleles are formed Darwin Wallace Thomas 1 Darwin Circumnavigation of the world in HMS Beagle Established theory of natural selection evolution Survival of the fittest he concluded only those organisms that are well suited for the environment will survive long enough to produce offspring Origin of Species 1858 2 Alfred Wallace Additional information to natural selection and evolution 3 Thomas Malthus Malthus stated there was an increase in human population and not enough resources to accommodate for everyone Darwin used this theory in his evolution theory Fitness relative contribution an individual makes to gene pool of the next generation Natural Selection Allele frequencies changing from generation to generation according to the allele s impact on the survival and reproduction of individuals Acts on individuals because individuals have mutations occur but with time the population evolves based on whether the mutation is harmful or beneficial If the mutation is harmful it will have no long term evolutionary impact Individuals that are best adapted to the environment are selected for Nature selects which variation will be inherited and which will be diminished Evolution



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