PPt.4: Introduction to Evolution Unit 1 Flashcards
A change in gene or allele frequencies
Evolution
Alternate forms of the same genes
Alleles
Provide raw material for evolutionary change
ULTIMATE source of all genetic novelty
Mutations
Natural selection acts in sexually reproducing organisms because of its potential to amplify existing genetic variation
Genetic Recombination
Special kind of nuclear division which is necessary for sexual reproduction
Meiosis
Differential Reproduction
Natural Selection
Random changes in gene frequency that occur in small populations due to sampling error
Genetic Drift
Concealment
Crypsis
Occurs when the probability that two individuals in a population will mate is not the same for all possible pairs
-preferred
Non-Random mating
Non-random mating pattern where individuals with similar genotypes or phenotypes mate with eachother more frequently
Assortative mating
A mode of natural selection, some reproduce more than others
Sexual Selection
Males necks and skulls are larger and more armored than females
Sexual Dimorphism
(W) Number of offspring left by an individual
Fitness
Ultimate source of all genetic novelty
Mutation
In sexually reproducing organisms, existing genetic variation is amplified by
Genetic Recombination
