Genes and Variation
The combined genetic information of all members of a particular population forms a
What is gene pool?
The type of selection in which individuals of average size have greater fitness than small or large individuals have is called
What is stabilizing selection?
Temporal isolation occurs when 2 different populations
What is reproduce at different times?
What is a gene family?
Mutations and the genetic recombination that occurs during sexual reproduction are both sources of
What is genetic variation?
Mutations that improve an individual's ability to survive and reproduce are
What is beneficial or an adaptation?
A random change in a small population's allele frequency is known as
What is genetic drift?
When 2 populations no longer interbreed?
What is reproductive isolation?
Each " tick" of a molecular clock is an occurrence of
What is DNA mutation?
These are responsible for determining body positioning during development
What are hox genes
Traits, such as human height, that are controlled by more than one gene are known as
What are polygenic traits?
The situation in which allele frequencies in a population remain the same.
What is genetic equilibrium?
A population or group of populations whose members can interbreed and produce fertile young
What is a species?
These mutations have no effect on phenotype
What is neutral?
Populations of antibiotic resistant bacteria are the result of the process of
What is natural selection?
The number of times an allele occurs in a gene pool compared with the total number of times all alleles for the same gene occur.
What is allele frequency?
In a single gene trait, natural selection leads to a change in this
What is a change in the frequency of one or a few distinct phenotypes?
These are the 3 types of isolation that can lead to new species formation.
What are geographic isolation, temporal isolation and behavioral isolation?
This is the study of the relationship between evolution and embryological development.
What is "evo-devo"?
Two species that share very similar genes share this
What is a recent common ancestor?
The passing of genes from one organism to another organism that is NOT its offspring
What is lateral gene transfer?
In a certain population of plants, flower size is a polygenic trait. If environmental conditions favor small flowers this population would show this type of selection.
What is directional selection?
List the 3 mechanisms involved in the Galapagos finches becoming new species
What are: the founder effect, geographic isolation and natural selection?
The length of time that two taxa have been evolving separately can be estimated using.
What is a molecular clock?
Evolution cause some alleles to become more common in a gene pool and other alleles to become less common. This changes the relative frequency of the alleles in the gene pool. This is due to what 2 mechanisms
What are natural selection and genetic drift?