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16 Cards in this Set
- Front
- Back
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What is the age of the universe?
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14 billion years
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What is the age of the earth?
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4.55 billion years
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What is the age of life forms?
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500 million years
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What is the name of the explosion at the age of life forms?
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Cambrian explosion
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What is the age of archaic humans (Homo sapiens)
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150,000 years
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What is the age of modern humans (homo sapiens sapiens)?
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25,000 years
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How many pairs of chromosomes are there?
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23 pairs
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what is the 23rd chromosome pair?
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XX-female, XY-male
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How many genes are there?
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23,000
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What are examples of phenotype differences?
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Eye color, hair color, and skin color.
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What genotype is approximately 98% the same as modern human beings?
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Common chimpanzee
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What genotype is 93% similar to humans?
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Gorilla
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What are the branches of old world monkeys?
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(Gibbon, Siamang), Orang, Gorilla, (Chimp, Bonobo), Hominids.
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Where is the suggested source of common ancestors?
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Africa
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Is there more phenotype variance within a group or between other ethnic groups?
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Within a group
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Does cultural differences divide human populations more than genotype differences?
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yes.
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