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 disorder is autosomal recessive based on the following observations: 
The trait skips generations, as unaffected parents can pass the recessive allele to their offspring. 
Both males and females are equally affected, indicating autosomal inheritance. 
The condition appears only in individuals inheriting two copies of the recessive allele, one from each parent.
This pattern eliminates options for X-linked or dominant inheritance, confirming autosomal recessive inheritance.