Bio200-Variability, Selection, And Drift

Front 1

Evolution

Back 1

The theory that all organisms on Earth are relate by common ancestry and that they have changed over time, premoninantly via natural-selection.

Front 2

Natural selection

Back 2

The differential capacity for survival and reproduction

Front 3

Genetic Drift

Back 3

Any change in allele frequencies due to random events. Causes allele frequencies to drift up and down rnadomly over time, and eventually can lead to the fixation or loss of alleles

Front 4

Heritability

Back 4

The favored varieties have higher fitness values

Front 5

Variability

Back 5

The fact that traits vary among members of the same species

Front 6

Differential Capacity for survival and reproduction

Back 6

The environment and the conditions under which a species lives favor some varieties over others

Front 7

Population

Back 7

A group of individuals of the same species living in the same area at the same time

Front 8

Frequency histogram

Back 8

allows for the qualitative analysis of data

Front 9

Mean

Back 9

A measure of the center of the data

Front 10

Standard Deviation

Back 10

A measurement that indicates how the data points vary around the average. (S)

Front 11

Variance

Back 11

(s^2) take the square root to get standard deviation

Front 12

Dariwinian/relative fitness

Back 12

Comparing two types of individuals and seeing their relative success at survival and reproduction

Front 13

Founder effect

Back 13

A change in allele frequencies that often occurs when a new population is esablished from a small group of individual, due to chance variations in gene frequency in the small group.