My Family Tree
By: Carlos San Martín Fdez.
What is a family tree?A family tree is a drawing or chart that shows how the
different members of a family are related to each other.
What is my trait?• My trait is “left thumb over right thumb.”
Autosomal dominant inheritance
(Me)
aa
Aa Aa Aa
Aa
Aa
Aa
Aaaa
aaaa aaaa
aa
aa
Left Thumb over Right Thumb (AA, Aa)Right Thumb Over Left Thumb (aa)
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