Ap Biology (The Chromosomal Basis Of Inheritance: 15.1-2)

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Chromosome Theory of Inheritance

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A basic principle in biology stating that genes are located in chromosomes and that the behavior of chromosomes during meiosis accounts for inheritance patterns.

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Wild Type

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An individual with the normal (most common) phenotype.

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Linked Genes

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Genes located close enough together on a chromosome to be usually inherited together.

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Parental Types

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The genetic make up, or set of alleles, of an organism

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Recombinant Types (recombinants)

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An organism that is heterozygous with respect to two genes of interest.

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Crossing Over

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An organism that is heterozygous with respect to a single gene of interest.

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Genetic Map

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An offspring with a phenotype that matches one of the parental phenotypes.

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Linkage Map

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An offspring whose phenotype differs from that of the parents; also called recombinant types.

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Map Units

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The reciprocal exchange of genetic material between nonsister chromatids during prophase I of meiosis.

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Cytogenic Maps

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Breeding of an organism of an unknown genotype with a homozygous recessive individual to determine the unknown genotype. The ratio of phenotypes in the offspring determines the unknown genotype .