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18 Cards in this Set
- Front
- Back
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chromosome
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string of nucleic acid and protein in the nucleus that carries genetic info
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homologous chromosome
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same genes
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gene
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parent to offspring
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allele
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alt forms of genes
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homozygous
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same letter so characteristic is present
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heterozygous
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different letters so there are variations in offspring
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chromatid
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half of the "X" of the chromosome that contains a double helix of DNA
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3 point mutations
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deletion, addition, substitution
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4 chromosomal mutations
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duplications, deletions, inversions, reciprocal translocations
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polygenic inheritance
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many genes determine a single trait
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continuous variation
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distribution of phenotypes follows a bell shaped curve
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nondisjunction
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failure of chromosomes to seperate properly: turners (sex) downs (non-sex)
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evolution
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change in allele frequencies over time
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natural selection
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adapt to environment
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phenotype
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obervable characteristics based on geno with envior
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genotype
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all genetic info of ind org
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biodiversity
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the product of speciation over time
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4 components of theory of evolution by natural selection
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overproduction, limited resources, genetic vatiation, survival of the fittest
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