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Honors List 12

Unit 6

TermDefinition
Bottle Neck Effect occurs when a small group survives a natural disaster and has a different gene pool that the original population
Founders Effect a small group migrates away from the larger group: the gene pool is not the same as the original pool
Genetic drift a change in the allele frequency NOT due to natural selection: it is random
Adaptive radiation after mass extinction, certain species fill in empty spaces and flourish.
Mechanical isolation separation of a species due to incompatibility of genitalia ex. Great Danes and Chihuahuas.
Macroevolution evolution in a huge way, causing species to go extinct and allowing others to succeed. ex. KT event 65 million years ago
Microevolution evolution in a small way ex. a gene change in a population over 30 years. ex. furless vs furred rabbits
reproductive isolation separation of a species due to the inability of producing offspring
Geographic Isolation separation of a species due to a barrier like an ocean or a mountain.
Gene shuffling genetic variation caused by segregation of alleles and crossing over during meiosis, along with sexual reproduction
Homozygous lethal alleles stay in the population due to heterozygous individuals
Variation the subtle differences among a species due to genetic differences. Ex. Egrets have short, medium, and long legs.
Diversity It is the reason why the Peppered Moth of London survived in a a changing environment and did not go extinct
Speciation the formation of a new species
Gene pool the combined alleles for all members of a population
Mutations can be neutral, beneficial, or deadly
Created by: natalie.connolly
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