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Microevolution - More Mechanisms - V2 There are 5 mechanisms that affect real populations resulting in microevolution or changes to allele frequencies within a population. 1. Natural Selection 2. in gametes 3. Genetic Drift a. b. Effect Effect

Microevolution - More Mechanisms - V2 There are 5 mechanisms that affect real populations resulting in microevolution or changes to allele frequencies within a population. 1. Natural Selection 2. in gametes 3. Genetic Drift a. b. Effect Effect

Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter21: Microevolution: Genetic Changes Within Populations
Section: Chapter Questions
Problem 1TYK: The reason spontaneous mutations do not have an immediate effect on allele frequencies in a large...
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Microevolution - More Mechanisms - V2 There are 5 mechanisms that affect real populations resulting in microevolution or changes to allele frequencies within a population. 1. Natural Selection 2. in gametes 3. Genetic Drift a. b. 4. 5. Non-random Mating or a. In-breeding b. Assortative mating Original sequence 1. Mutations IM Mutations are only important to evolution if the Point mutation and passed on to offspring. The new mutation provide an for natural selection. Ex) Daphnia adapted to warmer water are more likely to survive climate change. 2. Genetic Drift Genetic drift is defined as due to a The smaller the population the less likely all of the alleles in the parent gene pool will be reflected in the offspring gene pool. There are two types of genetic drift. a) The Bottleneck Effect First is the bottleneck effect. This is a in alleles in a that drastically reduces resulting from a population size. Ex: earthquakes, volcanoes Newly founded populations do not always represent the genetic diversity in the original population. b) The Founder Effect Secondly, the founder effect occurs when a few individuals from a large population and establish a in a can be very different and some alleles can be missing in the new population. Effect Effect Genetic Drift-Bottleneck Effect Next Parent Bottleneck Surviving population (drastic reduction individuals generation in population) The new population allele ratios
Transcribed Image Text:Microevolution - More Mechanisms - V2 There are 5 mechanisms that affect real populations resulting in microevolution or changes to allele frequencies within a population. 1. Natural Selection 2. in gametes 3. Genetic Drift a. b. 4. 5. Non-random Mating or a. In-breeding b. Assortative mating Original sequence 1. Mutations IM Mutations are only important to evolution if the Point mutation and passed on to offspring. The new mutation provide an for natural selection. Ex) Daphnia adapted to warmer water are more likely to survive climate change. 2. Genetic Drift Genetic drift is defined as due to a The smaller the population the less likely all of the alleles in the parent gene pool will be reflected in the offspring gene pool. There are two types of genetic drift. a) The Bottleneck Effect First is the bottleneck effect. This is a in alleles in a that drastically reduces resulting from a population size. Ex: earthquakes, volcanoes Newly founded populations do not always represent the genetic diversity in the original population. b) The Founder Effect Secondly, the founder effect occurs when a few individuals from a large population and establish a in a can be very different and some alleles can be missing in the new population. Effect Effect Genetic Drift-Bottleneck Effect Next Parent Bottleneck Surviving population (drastic reduction individuals generation in population) The new population allele ratios
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