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Question

Select the statements that describe characteristics of genes :
(i) genes are specific sequence of bases in a DNA molecule
(ii) a gene does not code for proteins
(iii) in individuals of a given species, a specific gene is located on a particular chromosome
(iv) each chromosome has only one gene

(a) (i) and (ii)
(b) (i) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)

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Solution

(b) (i) and (iii)
A gene is the section in a DNA on a chromosome that codes for the formation of a protein, controlling a specific characteristic of the organism. The two genes which are responsible for a particular characteristic are always present on the corresponding position of the pair of chromosomes. There are thousands of genes on a chromosome, which control various characteristics of an organism.

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