Question

The most likely occurrence of a human hereditary disorder that is present only in males is

• A. Maternally inherited
• B. A Y-linked trait
• C. An autosomal recessive trait
• D. An X-linked recessive trait
• E. An X-linked dominant trait

Answer 1

The correct option is B A Y-linked trait

Since human males are hemizygous for Y chromosome and the chromosome is present only in males, Y-linked diseases occur exclusively in males only. This makes option B correct. Autosomal or X-linked diseases can occur in both males and females although X-linked recessive diseases are more frequent in human males.

Therefore, the correct answer is option B.