Selection Patterns
This is the state when the frequency of alleles remains the same from generation to generation.
What is Hardy-weinberg equilibrium?
An example is the Mule, an infertile offspring of a horse and a donkey
What is a post-zygotic isolating mechanism
This occurs when no member of a species remain to reproduce
What is extinction?
This is where two sister chromatids are joined.
What is a centromere
This pattern describes a section force that minimizes the intermediate form of the trait
What is disruptive selection?
p=.3
q=.7
2pq?
What is .42?
An example is when two species of reptile occur in the same area but in different habitats.
What is habitat isolation
This is what we call it when a new species is formed
What is speciation?
This is when crossing over can occur
What is prophase I
This pattern describes a section force that minimizes both extremes of the trait
What is stabilizing selection?
This is the Hardy-Weinberg equation
What is p2 + 2pq +q2?
An example can be seen among songbirds in Hawaii displaying different mating rituals
What is an example of behavioral isolation?
This is what it is called when there is change in allele frequency over time due to random chance
What is genetic drift?
This is what gets separated during anaphase I
What are homologous chromosomes
An example of this can be seen when female birds prefer to mate with males that display talent when dancing.
What is sexual selection?
In a population of 1000, when 18 are homozygous recessive, this is how many we would expect to be homozygous dominant.
What is 749
An example is a glacial dam that prevents populations from interbreeding.
What is geographic isolation?
This is the movement of alleles into and out of a population due to migration
What is gene flow?
Gametes have this chromosome count and state of replication.
What is haploid with un-replicated chromosomes.
An example can be seen when courtship behaviors of a bird species divide the population.
What is behavioral isolation?
These are the 5 criteria for Hardy-Weinberg equilibrium?
What is large population, no mutation, no migration, no natural selection and random mating?
This was the idea that evolution occurs at a slow and constant rate
What is gradualism
This is the formation when non sister chromatids join
What is a chiasma
This pattern describes a section force that favors individuals with one of the extreme forms of the trait
What is directional selection?
If q = .6, this is what percentage of individuals we would expect to be heterozygous.
What is 48%
Sum of all alleles for all traits in a population
What is a gene pool?
This is a result of the random orientation of homologous chromosomes in metaphase I of meiosis
What is the law of independent assortment