How can both parents be tall, even though their genes for height are not exactly the same?

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Mathematics

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17 December, 20:11

How can both parents be tall, even though their genes for height are not exactly the same?

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Carlos Dougherty · Answer 1

Both of the Billy's parents (calling the parent billy) being tall is a recessive trait therefore both Billy's parents has to have at least one recessive trait to make a tall child. Billy's genotype would be way tt (aka recessive, recessive).