All the individuals of the same species in a given area at the same period of time
Population
Fitness
Genetic variation
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
Evolution
Genetic variation is
Change over time in the relative frequencies of allele variations
When there are different alleles for at least some of the population's genes
All the individuals in a given area
Select all that apply. Fitness is a measure of________
Reproductive success contributed to the next generation
Compared to others in the same population and generation cohort
The genetic change in a population
The source of new alleles because of spelling changes in DNA
Mutation
Migration
Natural selection
Natural selection and genetic drift cause evolutionary change because______ (select all that apply)
Some alleles become more common in the next generation
Some alleles become less common in the next generation
It is all about differential reproductive success
A mechanism of evolution that causes a change in the allele frequencies of a population because of chance events not based on genetic traits
Genetic drift
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)
One of the mechanisms of evolution
Gene fixation
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)
Founder effect
Bottleneck
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)
Belong to the same species
Be in the same breeding area
Be alive during the same period in time
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
