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331.

A normal woman whose father was colour-blind is married to a normal man. The sons would be
(a)75% colourblind
(b)50% colourblind
(c)All normal
(d)All colourblind
Comment
Answer is: BNA

332.

Gene for colour blindness is located on
(a)Y-chromosome
(b)13th chromosome
(c)X-chromosome
(d)21st chromosome
Comment
Answer is: DNA

333.

Gene present on Y-chromosome are called
(a)Halandric genes
(b)Basic gene
(c)Pleiotropic genes
(d)Polygenic genes
Comment
Answer is: ANA

334.

Sex-determination by environment factors is commonly observed in
(a)Drosophila melanogaster
(b)Mirabilis jalapa
(c)Melandrium album
(d)Bonelliaviridis
Comment
Answer is: DNA

335.

The absence of Y-chromosomes in human beings causes
(a)Turner's syndrome
(b)Klinefelter's syndrome
(c)Down's syndrome
(d)No abnormality
Comment
Answer is: ANA

336.

Gaucher's disease is associated with abnormal metabolism of
(a)Fat
(b)Nucleic acid
(c)Protein
(d)Carbohydrates
Comment
Answer is: ANA

337.

Which of the following is sex-linked in heritance?
(a)Thalassemia
(b)Phenylketonuria
(c)Goitre
(d)Haemophilia
Comment
Answer is: DNA

338.

Gynandromorph is
(a)Male with female traits
(b)Female with male traits
(c)Half male and half female
(d)None of the above
Comment
Answer is: CNA

339.

Chromosomes be counted best in
(a)Metaphase
(b)Early prophase
(c)Mid Prophase
(d)Late prophase
Comment
Answer is: ANA

340.

Increase of age decreases
(a)Crossing over
(b)Linkage
(c)Polyploidy
(d)Mutation
Comment
Answer is: ANA

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