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Kitty [74]
3 years ago
14

A family has two male children. one brother has a straight thumb, while the other brother has a bent thumb. What causes this dif

ference?
Biology
2 answers:
dalvyx [7]3 years ago
6 0
The parents had two recessive traits for a bent thumb.
timurjin [86]3 years ago
5 0

They received different alleles from their parents

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