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Standard XII
Biology
Question

Albinism in rats and white eyed Drosophila are examples for
  1. Variations
  2. Acquired characters
  3. All of the above
  4. Mutations

A
Variations
B
All of the above
C
Acquired characters
D
Mutations
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Solution
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Albinism in rat results in the development of white coat colour. The colour of the eyes in the Drosophila is red and brown. The development of the white coloured eyes in the males of the Drosophila has been observed. This change in the colour is the effect of the spontaneous mutation. Spontaneous mutation is the random mutation which helps in evolution.
Thus, the correct answer is option B.

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