Gene for colourblindness is located on [CPMT 1984; MH CET 2002; MP PMT 2003]
A) Homologous part of X-chromosome
B) Non-homologous part of X-chromosome
C) Homologous part of Y-chromosome
D) Non-homologous part of Y-chromosome
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Answer is (B)
colour blindness is a recessive sex-linked disease, genes of which are present exclusively on non-homologous segment of X chromosome, so males need only one affected chromosome to express the character whereas females need both the affected chromosomes to exhibit the same.
colour blindness is a recessive sex-linked disease, genes of which are present exclusively on non-homologous segment of X chromosome, so males need only one affected chromosome to express the character whereas females need both the affected chromosomes to exhibit the same.
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Gene for colourblindness is located on [CPMT 1984; MH CET 2002; MP PMT 2003]
A) Homologous part of X-chromosome
B) Non-homologous part of X-chromosome
C) Homologous part of Y-chromosome
D) Non_homologous part of Y -chromosome
Answer
Gene for colourblindness is located on option (B) Non - homologous part of X -chromosome
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