›Introduction to DNA and Genealogy
  ››mtDNA and Y-DNA
 ›Meiosis and Crossover


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As explained on other pages, the sex chromosomes (ie. gender determining chromosomes) are the X and Y chromosomes. A man has one X and one Y chromosome, and a woman has two X chromosomes. X chromosomes are not clonal, and will "recombine" when the egg is formed. The inheritance pattern is more complicated as you will see below:

Inheritance pattern for Males
(one X chromosome from their mother)



Inheritance pattern for Females
(one X chromosome from each parent)



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