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ICSE Class 10 Biology Question 7 of 30

Solved Sample Paper 1 — Question 14

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14
Question

Question 1(xiv)

The average ratio of male to female individuals based on XX and XY type of sex-determination, in a human population is

  1. 3:1
  2. 1:3
  3. 1:4
  4. 1:1
Answer

1:1

Reason — XX and XY are equal giving a ratio 1:1.