Unit 4 Bio

EVOLUTION

The change in heritable traits in a population over generations
GENE POOL

The total collection of genes in a population at any one time
POPULATION

Group of individuals (same as species) living in the samae place at the same time
MICROEVOLUTION

A change in the relative frequencies of alleles in gene pool over time.
MUTATION
- -Changes in the nucleotide sequence
- - The ultimate source of new alleles
Discrete Characteristics

determined by different alleles at single locus
QUANTITATIVE CHARACTERS
- Vary along a continum within a population
- determined by action of two or more genes at different loci
FOR POPULATION TO REMAIN IN HARDY-WEINBURG EQ it must have what 5 characteristics
- Very Large population
- No gene flow between populations
- No Mutations
- Random Mating
- No Natural Selection
NATURAL SELECTION

change in allele frequencies because certain alleles confer higher relative fitness
GENETIC DRIFT

change in allele frequencies due to chance occurrence in small populations
GENE FLOW

change in allele frequencies due to mixing of genes between populations

Author

Anonymous

1954

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Unit 4 Bio

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Concepts Bio I notecards

Updated

12/1/2009, 4:06:30 AM

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