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Give Reason or Explain the Statement :Human female is referred to as carrier of colour blindness |
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Answer» Human female is referred to as carrier of colour blindness because of the following reasons: 1. Females possess double Xchromosomes in her gametes. 2. If one X-chromosome is carrying recessive gene for colour blindness, her other dominant X hides the expression of colour blindness and hence she does not become a patient. 3. But such female can carry the defective gene to her progeny. Thus she is called carrier of colour-blindness. 4. A female having one recessive gene on X-chromosome is a carrier female, while a female possessing both recessive genes on both the Xchromosomes will be colour blind which is very rare. |
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