Answer: X-linked recessive trait.
- A Autosomal dominant trait
- B Autosomal recessive trait
- C X-linked recessive trait
- D Y-linked trait
Correct answer: C. X-linked recessive trait
Explanation: Haemophilia is X-linked recessive. Males (XY) who inherit one affected X have the disease; females need two affected X chromosomes.
Punnett square for a monohybrid cross between two heterozygous (Tt) parents, showing the 3:1 phenotypic ratio predicted by Mendel's Law of Segregation.
Concept context
Mendel's laws, inheritance patterns, DNA structure, and molecular biology. Core of NEET biology.
Read the full Principles of Inheritance and Variation notes →