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Selection Selection Selection
How Things Change
Speciation Nation
Evidence of Evolution
Evolution Grab Bag
100

Selection that favors BOTH of the extremes (or both homozygotes). 

What is disruptive selection?

100
Selection in which humans choose desirable traits and breed organisms accordingly.
What is artificial selection?
100

Robins and Bluebirds sing different mating songs to attract females.

What is Behavioral Isolation

100

The molecular evidence for evolution.

What is DNA?

100

The term used to describe a population that is not evolving.

What is the Hardy-Weinberg Equillibrium

200

The loss of genetic diversity caused by a severe reduction in population due to a natural disaster

What is bottleneck effect?

200
A trait or behavior that helps one survive and reproduce in its environment.
What is an adaptation?
200

Two different species of deer are separated by a mountain range preventing them from mating.

What is Geographic Isolation

200
Similar structures found across species that serve as proof of a common ancestor.
What are homologous structures?
200

A type of diagram used to show evolutionary relationships between different species.

What is a Phylogenetic Tree/Cladogram

300

Selection that causes an increase in allele frequency of a specific allele, or one or the other of the homozygous genotypes. 

What is directional selection?

300

Allele frequency changes at the population level.

Microevolution

300
In snails, one species shell spins clockwise while the other counter clockwise. This prevents their reproductive organs from aligning.

What is Mechanical Isolation

300
Structures no longer used by a species but remain due to a past need.
What are vestigial structures?
300

A random change in the allele frequency of a population.

What is Genetic Drift

400

Selection that leads to a high proportion of heterozygotes due to the heterozygote advantage. Sickle cell is an example of this.

What is stabilizing selection?

400

A change in the genetic code of an organism that can lead to new phenotypes.

What is a Mutation

400

Tigers and lions will interbreed in captivity and produce offspring, but the offspring are all sterile. 

What is Reduced Hybrid Fertility

400

Ostriches, Emus, and Kiwis share a common ancestor but have all adapted to their different environments.

What is Biogeography

400
Examples are Mutations, Random Mating, and Sexual Selection

What are ways to increase genetic diversity

500

Selection that doesn't increase an organism's chances at survival and can lead to dimorphism.

What is Sexual Selection

500

Phenotypic changes at the species level or higher that can lead to speciation

Macroevolution

500

Two species of salamanders can successfully reproduce and birth offspring, but the offspring have many genetic problems and don't survive long after birth.

What is Reduced Hybrid Viability

500

The name of the ship Darwin rode during his exploration.

What is the H.M.S. Beagle

500

A required condition for the Hardy-Weinberg Equilibrium that is not

1. No mutations

2. Random Mating

3. Extremely Large Population

4. No gene flow

What is No Natural Selection