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Home Q & A Board Biology-Related Homework Help Medicine Nursing and Clinical
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nandhu nandhu
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6 years ago
All five of the children in a family were born with a genetic disorder. The disorder is inherited as autosomal dominant. If this is not a statistical rarity, the likelihood would be that:
 
  1. One parent has both chromosomes with the affected gene.
  2. Both parents are carriers.
  3. One parent is a carrier and the other parent is unaffected.
  4. One parent has one chromosome affected and the other parent has none.
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#1
6 years ago
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Rationale 1: It takes only one chromosome to cause the defect in the child. If one parent has both chromosomes affected, every child would receive the affected chromosome.
Rationale 2: If both parents are carriers, 25 of the children should be free of the disease.
Rationale 3: For all five children to have the disorder, one parent would have to have both chromosomes affected.
Rationale 4: For all five children to have the disorder, one parent would have to have both chromosomes affected.
Global Rationale:
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