Question

Study the pedigree chart of a family showing the inheritance pattern of a certain disorder. Select the option that correctly identifies the nature of the trait depicted in the pedigree chart: 

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

Hint:

Autosomal recessive traits require two copies of the defective gene for the disorder to manifest and can affect both genders equally.

Answer 1

The Correct Option is D

The autosomal recessive nature of the disorder is evidenced by several key observations:
The trait's tendency to skip generations, where unaffected parents transmit the recessive allele to their progeny. 
Equal prevalence in both sexes, indicative of autosomal inheritance. 
Manifestation solely in individuals possessing two copies of the recessive allele, one inherited from each parent.
These findings conclusively rule out X-linked or dominant inheritance patterns, thus confirming autosomal recessive inheritance.