Evolution winter bio

All the individuals of the same species in a given area at the same period of time

If two groups are too far apart to intermingle, they are separate populations

Change over time in the relative frequencies of allele variations in a population

Genetic variation is

Select all that apply. Fitness is a measure of________

The source of new alleles because of spelling changes in DNA

Natural selection and genetic drift cause evolutionary change because______ (select all that apply)

A mechanism of evolution that causes a change in the allele frequencies of a population because of chance events not based on genetic traits

A mechanism of evolution in which new alleles are added to a population when new individuals enter from another location

Individuals that survive or reproduce at a higher rate because of their genetic traits defines __________ (select all that apply)

Genetic drift is any condition that favors some alleles/traits for reproductive success and disfavor others alleles/traits.

Genetic drift has the biggest impact on small populations

Founder effect is where a small number of individuals establish a new population

The number of prairie chickens went from millions to fewer than 50, resulting in 30% of alleles being lost. This is an example of______. (Select all that apply)

Bottlenecks are a type of genetic drift that occurs because of a loss of a large percentage of population

Mechanisms for genetic change are_______

If there are different alleles for at least some of the population's genes, then there is genetic variation

Genetic variation is rare

To be considered a population biologically, which of the following must be true (select one or more)

If an allele becomes the only form of the gene present on a population, then it is 'fixed'

The genetic diversity of a 'founder' population introduced on a small island would be expected to be less than the genetic diversity on the mainland