2 Flashcards
(31 cards)
- Mutations can change allele frequencies. A typical gene mutates once every (number) cell divisions. Fill in the blank.
100,000
- How are mutations and evolution related?
Mutations are the genetic mechanisms that is allowing for evolution to occur,
- What is the definition of gene flow?
The movement of allele from one population to another
- Why is gene flow important?
It helps to improve genetic diversity.
- What is the definition of assortative mating?
Phenotypically similar individuals mate, a type of nonrandom mating, and causes more homozygous offspring
- What does assortative mating result in phenotypically?
A homozygous population
- What is the definition of disassortative mating?
Phenotypically different individuals mate more often, random mating
- What does disassortative mating result in phenotypically?
A heterozygous population
- What is the definition of genetic drift?
change allele frequencies in a population
- How can genetic drift change the genetic frequencies of a small or large population?
Small population: will affect frequencies of a particular allele heavily
Big population: wont be affected much
- According to the video Genetic Drift, what is the difference between genetic drift and natural selection?
In genetic drift, everything is random.
In natural selection, organisms have traits that can result in high fitness & they can pass those alleles to their offspring.
- Which statement describes a bottleneck effect?
So few individuals form the next generation (from being wiped out), a complete change in frequencies
- How can a bottleneck effect change the alleles of a population?
The allele frequencies can change and possibly make them disappear
- According to the video Speciation, how can natural selection bring about speciation?
it can occur when populations are reproductively isolated in some form
- According to the video Speciation, which statement accurately describes (a) allopatric speciation or (b) sympatric speciation?
- Three conditions exist for natural selection to occur. Which statement does not describe one of these conditions?
- Variation must exist among individuals
- Must result in differences in the number of offspring surviving in the next generation
- Variation must be genetically inherited
- Which is not one of the five agents responsible for evolutionary change?
- mutation
- non-random mating
- gene flow
- finite population size (genetic drift)
- natural selection
- What is the definition of classification?
How species are grouped based on the taxonomic hierarchy
- What is the definition of taxonomy?
Taxonomy - the naming and classification of species
- According to the video Classification, which person gets credit for first creating this taxonomy (classification) system?
Carl Linnaeus
- Which statement does not describe the rules to naming an organism scientifically?
Dear King Paramecium Cares Only For Green Spirulina
- What is the proper order of a taxonomic hierarchy?
Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
- What is the definition of systematics?
The reconstruction and study of evolutionary relationships
- What is the definition of phylogeny?
Similarities and differences between species and than forming a tree
