Chapter 13 vocab Part 2

Chapter 13 vocab Part 2 - Balancing selection-Heterozygous...

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Chapter 13 vocab. Part 2 Hardy-Weinberg equilibrium- A layer of sedimentary rock that was formed as sediments of sand and mud were compressed into rock by overlying deposits Genetic drift- Changes in the gene pool of a small population due to chance Bottleneck effect- Founder effect- Genetic drift attributable to colonization by a limited number of individuals from a parent population Gene flow- The loss or gain of alleles in a population due to the migration of fertile individuals or gametes between populations Polymorphic- Referring to a population in which two or more physical forms are present in readily noticeable frequencies Mutations- A rare change in the DNA of a gene ultimately creating genetic diversity
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Unformatted text preview: Balancing selection-Heterozygous advantage- Greater reproductive success of heterozygous individuals compared to homozygotes; tends to preserve variation in gene pools Frequency dependent selection-Neutral variation- Genetic diversity that confers no apparent selective advantage Stabilizing selection- Natural selection that favors intermediate variants by acting against extreme phenotypes Disruptive selection-Sexual dimorphism- A special case of polymorphism based on the distinction between the secondary sex characteristics of males and females...
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