Sponsor Area

Principles Of Inheritance And Variation

Question
CBSEENBI12047309

Which pairs of the following diseases are caused by two genes located on human X-chromosomes?

  • Colour blindness and phenylketonuria

  • Colour blindness and haemophilia

  • Colour blindness and albinism

  • Colour blindness and hypertrichosis

Solution

B.

Colour blindness and haemophilia

X- linked recessive inheritance is a mode of inheritance in which a mutation in a gene on the X- chromosome causes the phenotype to be expressed in males. Colour blindness and haemophilia both are the examples of X-linked recessive traits.