Write about hereditary colour blindness
Answers
Answer:
when mother gene or father gene has difficult in seeing colours there exist the deficiency of vitamin A which comes as heredity in the child
Hi mate,
here's the answer
Different kinds of colour-blindness have been detected but in the most common
Again this is due to the presence of a defective gene or absence of the gene,responsible for colour vision.The genes for both haemophilia and colour-blindness are located on X-chromosome,
and hence, the disorder is passed down from mother to the son because a boy receives the X chromosome from the mother and Y chromosome from the father.
In the mother, with two X-chromosomes, the defect does not show up. Also in the
daughter, the effect of defective gene on X-chromosome inherited from mother
may be masked by a normal gene on the X-chromosome, inherited from her father.
Since X chromosome bears the defective gene,
the son suffers from the genetic disorder, as male has only one X chromosome and one Y chromosome and so the defective gene does not get masked.
hope this helps you
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