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6. How many recessive alleles must be inherited to get sickle cell disease? *
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6. How many recessive alleles must be inherited to get sickle cell disease?
*

User Ziko
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Answer: 2 recessive alleles

I will use the letter r as an example.

Rr: sickle cell disease is absent
RR: sickle cell disease is absent
rr: sickle cell disease is present

If sickle cell disease is a recessive trait it will be expressed as rr.

User Surgiie
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