Natural Selection and Other Mechanisms of Evolution
Speciation Through Isolation
Patterns in Evolution
Hardy-Weinberg Equilibrium
100
Where does genetic variation come from?
What isBoth mutation and recombination. (Gene shuffling)
100
What term describes selection that increases the number of individuals with an intermediate phenotype?
Stabilizing selection
100
What term describes the formation of two species from one existing species
speciation
100
What is an example of gene flow?
Populations moving into another population.
Immigration/emigration.
100
What factor does not lead to evolution?
A stable gene pool,
NO immigration,emigration
200
How many alleles for connected earlobes are in the gene pool of a population of 100 people? Assume connected earlobes is determined by simple Mendelian genetics.
what is 200
200
In the middle range
Where is the most common phenotype found in a normal distribution?
200
Fireflies recognize flash patterns to identify mates of the same species. Suppose a population of fireflies has a mutation that changes the flash pattern. What kind of barrier is this?
What is Behavioral Isolation
200
What term describes the process in which two or more species evolve in response to each other
Coevolution
200
What is the frequency of an R allele in a population if the frequency of the r allele is 0.4?
0.6
300
What is NO, the mutation can not be passed on to the offspring
Does a mutation in a body cell change the genetic variation in the gene pool?
300
What term describes the recent increase in antibiotic-resistant bacteria, causing the number of resistant bacteria to increase. (SHIFT)
Directional selection
300
Why are chemical scents called behavioral barriers?
Scents are signals that lead to mating behavior
300
What can be said about a population that is in Hardy-Weinberg equilibrium
Is is NOT evolving
300
What happens to a population that is no longer in equilibrium
The population begins to evolve
400
When does hybridization occur in nature?
What is when individuals of different species cannot find mates of their own species
400
What kind of selection increases the numbers of individuals with extreme phenotypes?
Disruptive selection
400
What is an example of temporal isolation
What is different mating seasons
400
Certain bees have evolved structures that help to pollinate flowers. The flowers have evolved structures that make it easier for certain species of bees to land and collect nectar. What is this kind of evolution called
Coevolution
400
Name 3 out 5 conditions will keep a population in equilibrium
What are 1. Random mating 2. Large Population 3. No Mutations 4. No immigration or emigration 5. No natural selection
500
How will a showy trait in males become established in a population?
(long tail feather, Bright red color)
What is reproductive selection.
Males with that trait will mate more often and pass that trait on to their offspring
500
Which statement about microevolution is true?
Microevolution occurs in SINGLE population
500
How are the bottleneck effect and founder effect similar?
Both are examples of GENETIC Drift
500
What pattern in the fossil record describes punctuated equilibrium
Rapid bursts of speciation followed by long periods of evolutionary stability
500
What is the frequency of a recessive allele for red flower color in a population of 100 plants? 25 plants are homozygous dominant, 50 plants are heterozygous, and 25 are homozygous recessive.