Human mitochondrial DNA has 22 tRNA genes, 2 rRNA genes, and 13 protein-coding regions. 

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#Unit 8. Inheritance Biology

Linkage mapping

Gene Mapping- Maps based on recombination rates are called genetic maps. 

Physical mapping- Maps based on physical distances are called physical maps. 

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#Unit 8. Inheritance Biology

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#Unit 8. Inheritance Biology

Both genetic and physical maps provide information about the relative positions of and distances between genes. Genetic maps are based on rates of recombination and are measured in recombination frequencies (centiMorgans or map units). 

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#Unit 8. Inheritance Biology

Recombination frequencies Recombination frequencies can be used to determine the order of the genes on a chromosome and calculate the approximate distances from one gene to another.

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#Unit 8. Inheritance Biology

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#Unit 8. Inheritance Biology

Two point test cross mapping