NEET2026BiologyChapterActual
Select the correctly matched pair of the Mendelian disorder and its mode of inheritance.
Options
- APhenylketonuria – Autosomal dominant trait
- BColour blindness – X-linked recessive trait
- CHaemophilia – Autosomal recessive trait
- DThalassemia – X-linked dominant trait
Correct answer
B. Colour blindness – X-linked recessive trait
Step-by-step solution
Phenylketonuria is an inborn error of metabolism that is inherited as an autosomal recessive trait. Colour blindness is a sex-linked (X-linked) recessive disorder due to a defect in either the red or green cone of the eye. Haemophilia is a sex-linked (X-linked) recessive disease, which shows its transmission from an unaffected carrier female to some of the male progeny. Thalassemia is an autosome-linked recessive blood disease transmitted from parents to the offspring when both the partners are unaffected carriers