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1 :

Hint : 🧬One normal, one abnormal gene

Correct Answers:

  • True


Rationale :

🌸 Autosomal recessive disorders occur only when an individual inherits two abnormal (recessive) genes, one from each parent.

🌸 A carrier has one normal gene and one abnormal gene.

🌸 Carriers usually do not develop the disorder because the normal gene masks the effect of the abnormal gene.

🌸 When both parents are carriers, each pregnancy has a 25% chance of producing an affected child, a 50% chance of producing a carrier, and a 25% chance of producing a child with two normal genes.

🌸 Genetic counseling is often recommended for couples who are known carriers of autosomal recessive disorders.

🌸 Common autosomal recessive disorders include cystic fibrosis, sickle cell disease, and phenylketonuria (PKU).

🌸 Understanding carrier status helps families make informed reproductive decisions.

🌸 A carrier is correctly defined as a person who inherits one normal gene and one abnormal gene, making the statement true.


Distractor Analysis :

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