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title: "2.7.1 mt- and Y-DNA (2024)"
canonical: "https://wiki.groenkennisnet.nl/space/TAB/288424212/2.7.1%20mt-%20and%20Y-DNA%20(2024)"
format: markdown
---
The mitochondria in the cells descend from the mitochondria in the oocyte of the mother. They contain DNA and form a maternal extra-nuclear inheritance. This DNA is called mt-DNA, it shows no crossing over and can be used to trace female genetic lines in pedigrees.

They Y-chromosome is only passed from father to son. The DNA on this chromosome is called Y-DNA, it shows almost no crossing over and can be used to trace male genetic lines in pedigrees.