Answer to your Health Question
Question: I would like to know how many genes siblings share. I know that identical twins share 100% of their genes, but i'm curiuos about faternal or regular siblings? Hannah Smith
Answer: Dear Hannah,
Half a child's genes
are from his/her mother and half from his/her father. Fraternal twins
(like all siblings) share half of their genes. A child has a father and
a mother. Consequently, the child and father share 50% of their genes,
as do the child and the mother. However, the mother and father normally
do not share genes as a result of shared ancestors. Similarly, two full
siblings share also on average 50% of the genes with each other, while
half sibs share only 25% of the genes.
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