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anthropology test 1
ch 3
15
Anthropology
Undergraduate 1
02/08/2010

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Term
genes
Definition
portions of the DNA molecule that code for the production of specific proteins
Term
alleles
Definition
variants of a gene that code for different expressions of a trait
Term
dominant
Definition
allele that is expressed in a gene pair of unlike alleles
Term
recessive
Definition
allele is only expressed if present in a like gene pair
Term
phenotype
Definition
the physical or chemical results of genetic code
Term
genotype
Definition
the alleles possessed by an organism
Term
codominant
Definition
when both alleles of a gene pair are expressed in the phenotype
Term
chromosome
Definition
strands of dna in the cell nucleus
Term
gene flow
Definition
the exchange of genes among populations through interbreeding
Term
genetic drift
Definition
genetic change based on random changes within a species' gene pool; includes fission and the founder effect, and gamete sampling
Term
fission
Definition
the splitting up of a population to form new populations
Term
founder effect
Definition
genetic differences between populations produced bu the fact that genetically different individuals established the populations
Term
gamete sampling
Definition
the genetic change caused when new genes are passed to new generations in frequencies unlike those of the parental generation
Term
speciation
Definition
evolution of a new species
Term
macromutation
Definition
a mutation with extensive and important phenotypic results
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