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which of the following is example of sex-linked inheritence? night blindness anaemia color blindness cretinism

which of the following is example of sex-linked inheritence?
  1. night blindness
  2. anaemia
  3. color blindness
  4. cretinism

Grade:12th pass

1 Answers

Apoorva Arora IIT Roorkee
askIITians Faculty 181 Points
6 years ago
Colour blindness, orcolour visiondeficiency, is the inability or decreased ability to seecolour, or perceive colour differences, under normal lighting conditions. Colour blindness affects a significant percentage of the population.There is no actual blindness but there is a deficiency of colour vision. The most usual cause is a fault in the development of one or more sets ofretinalconesthat perceive colour in light and transmit that information to the optic nerve. This type of colour blindness is usually asex-linkedcondition. The genes that produce photo pigments are carried on the X chromosome; if some of these genes are missing or damaged, colour blindness will be expressed in males with a higher probability than in females because males only have one X chromosome (in females, a functional gene on only one of the two X chromosomes is sufficient to yield the needed photo pigments).
Thanks and Regards
Apoorva Arora
IIT Roorkee
askIITians Faculty

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