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In humans, there are different types of DNA: Autosomal DNA, X-DNA, Y-DNA, and Mitochondrial-DNA. Autosomal DNA is the most commonly used type of DNA used for research, but the other's have value as well. | In humans, there are different types of DNA: Autosomal DNA, X-DNA, Y-DNA, and Mitochondrial-DNA. Autosomal DNA is the most commonly used type of DNA used for research, but the other's have value as well. | ||
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|[[File:Morgan crossover 1.jpg|thumb|right|350px|<center>Autosomal Recombination<center>]] | |||
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== Autosomal DNA == | == Autosomal DNA == | ||
In humans, 95% of DNA is autosomal DNA. It consists of 22 pairs of chromosomes and in each pair, one is from mom and one is from dad. The pairs of chromosomes are simply names 1, 2, 3, etc... 21, 22. They are mostly named by their size with chromosome 1 being the largest, chromosome 2 being the second largest etc. They are not perfectly named by their size, for example chromosome 22 is actually bigger than chromosome 21, chromosome 20 is slightly bigger than chromosome 19 etc. This is because as our understanding of DNA grows and improves, some chromosomes turned out to be a little bigger or smaller than we initially thought. | In humans, 95% of DNA is autosomal DNA. It consists of 22 pairs of chromosomes and in each pair, one is from mom and one is from dad. The pairs of chromosomes are simply names 1, 2, 3, etc... 21, 22. They are mostly named by their size with chromosome 1 being the largest, chromosome 2 being the second largest etc. They are not perfectly named by their size, for example chromosome 22 is actually bigger than chromosome 21, chromosome 20 is slightly bigger than chromosome 19 etc. This is because as our understanding of DNA grows and improves, some chromosomes turned out to be a little bigger or smaller than we initially thought. | ||
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