Q88 / 200 · MHT CET - Medical 2026 (24 April Shift 1) · Biology
Hypertrichosis is _____________ character.
- AX - linked
- Correct answerBY - linked
- Cautosomal dominant
- Dautosomal recessive
Solution
Hypertrichosis pinnae, which refers to the presence of excessive hair on the external ear or pinna, is a classic example of a trait controlled by genes located on the non-homologous segment of the Y chromosome.
Traits determined by genes located on the Y chromosome are known as Y-linked or holandric traits.
Since females possess two X chromosomes ($XX$) and males possess one X and one Y chromosome ($XY$), Y-linked traits are exclusively transmitted from an affected father to all of his sons.
Therefore, hypertrichosis is a Y-linked character.
Answer: Y - linked
Traits determined by genes located on the Y chromosome are known as Y-linked or holandric traits.
Since females possess two X chromosomes ($XX$) and males possess one X and one Y chromosome ($XY$), Y-linked traits are exclusively transmitted from an affected father to all of his sons.
Therefore, hypertrichosis is a Y-linked character.
Answer: Y - linked
Hence, the correct answer is option: 'B'.