Down’s syndrome is caused due to an extra chromsome in

Down’s syndrome is caused due to an extra chromsome in

Options

(a) 12 ͭ ͪ chromosome
(b) 21 ͭ ͪ chromosome
(c) sex-chromosome
(d) 2ⁿᵈ chromosome

Correct Answer:

21 ͭ ͪ chromosome

Explanation:

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