Meiosis
Human Evolution
Speciation
History of Life
Mechanisms of Evolution
100
two chromosomes that are a matching pair
What is homologous chromosomes?
100
Heritable changes in traits over time in a population
What is Evolution?
100
Initial block to gene flow is a geographic barrier that physically isolates the splinter population
What is allopatric speciation?
100
Something that divides Earth's history into a consistent sequence of geologic periods
What is a geologic time scale?
100
Individuals wth certain traits are more likely than other individuals to obtain mates
What is sexual selection?
200
The exchange of corresponding segments between nonsister chromatids of homologous chromosomes
What is Crossing Over?
200
If you can digest milk as an adult
What is Lactase Persistent?
200
Anything that prevents individuals of closely related species from interbreeding
What is a reproductive barrier?
200
Life arises from the reproduction of preexisting life
What is biogenesis?
200
Change in the nucleotide sequence of DNA
What is mutation?
300
Genes located near each other on same chromosomes
What are linked genes?
300
Produces differential survival and reproduction success of individual organisms with different traits
What is Natural Selection?
300
The origin of a new species without geographic isolation
What is sympatric speciation?
300
Ordered sequence of fossils as they appear in rock layers, marking the passage of geologic time
What is fossil record?
300
Genetic exchange with another population
What is migration?
400
Pairs of homologous chromosomes line up
What is Metaphase 1?
400
A group of modern humans, extinct human species, and all of our immediate ancestors
What is a hominin?
400
one species split into two or more reproductively isolated populations
What is speciation?
400
Based on a decay of radioactive isotopes
What is radiometric dating?
400
Change in the gene pool of a population due to chance
What is genetic drift?
500
One diploid cell makes four haploid gametes
What is Meiosis?
500
Change in a trait that leads to an increase in survival or reproduction
What is Adaptation?
500
Operates if mating occurs between different species that result in hybrid zygotes
What is post-zygotic barriers?
500
A theory that all continents had been joined in a single supercontinent and broken up
What is the Continental Drift?
500
Similarities in traits due to adaptation in similar environment rather than shared ancestry
What is convergent evolution?
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