Probability of birth of healthy son with freckles

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Freckles are dominant to plain skin and the freckle gene is on an autosome. Becker muscular dystrophy is inherited as X-linked recessive trait. The parents are healthy and both have freckles. They have an affected son with plain skin. Draw up the family pedigree. Find the genotypes.

1. What is the chance that they will have a daughter who has the disease and who has freckles?

2. What is probability of birth of a healthy son with freckles?

3. What is probability of birth of two affected sons with plain skin?

Reference no: EM133307537

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