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How do you figure the percentage of offspring that will be a carrier of an Autosomal Recessive gene when the FATHER is the recessive carrier and the MOTHER is not affected (normal, no recessive)? Thank you for your assistance.

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Do your cross diagram and multiply the correct combinations together:

Father: Rr

Mother: RR

Since it's autosomal:

Chance of getting R from father: 50%

Chance of getting r from father: 50%

Chance of getting R from mother: 100%

You're looking for the chance of receiving Rr, which requires r from the father and R from the mother.

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