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What is a Chromosome?

The DNA in our body is found in chromosomes. Chromosomes are located in the nucleus of our cells. With the exception of gametes (sperm and egg), all of the nucleated cells in our body contain 23 pairs of chromosomes, 46 in total. One chromosome from the pair is inherited from our mother and the other one is passed down from our father. The 23rd pair of chromosomes are the sex chromosomes (X and Y). Females have two X Chromosomes, and males have one X Chromosome and one Y Chromosome (aka Y-DNA). The Y Chromosome in males holds important information about that individual’s paternal ancestry because the Y Chromosome is passed down strictly from father to son along the direct paternal lineage.  All males who have descended from the same paternal lineage will have the same Y Chromosome.

 

 

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