When researching family history, we often hear about DNA tests. For a fee, several companies perform tests that compare the DNA of one person with the DNA of millions of other people.

What is DNA? It is a molecule found in chromosomes in the nucleus of human cells. Usually, each cell of a person contains one pair of sex chromosomes that affect the sex of a person and 22 pairs that affect other aspects of a person. The other chromosomes are called autosomes. Normally, people inherit 12 autosomes from each parent and one sex chromosome from each parent. ×

This page requires Javascript.

Javascript is required for you to be able to read premium content. Please enable it in your browser settings. kAm~?6 @7 E96 D6I 49C@>@D@>6D[ <?@H? 2D *[ :D D9@CE6C[ :D :?96C:E65 7C@> E96 72E96C[ 2?5 92D

See Full Page