Question

Choose the correct answer from the alternatives given.
Study the pedigree chart of a family showing the inheritance of sickle-cell anemia.
The trait traced in the above pedigree chart is

• A. Dominant X-linked
• B. Recessive X-linked
• C. Autosomal dominant
• D. Autosomal recessive.

Answer 1

The correct option is D Autosomal recessive.

In the above pedigree chart generation, If parents are unaffected but the offspring is affected. Based on this the trait traced in the above pedigree chart is autosomal recessive.

If both parents are unaffected and an offspring is affected, the trait must be recessive (parents are heterozygous carriers)

If both parents show a trait, all offspring must also exhibit the trait (homozygous recessive)

So the answer is option D 'Autosomal recessive'.