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MAXIMUM TIME: 40 MINUTES

MAXIMUM MARKS: 20 marks


1.   Name two human traits that show variation. (1)
2.   What is microevolution? (1)
3.   Who is known as �Father of genetics�? (1)
4.   Why evolution should not be equated with progress? (1)
5.   How many pairs of chromosomes do human beings have, specify the types of chromosomes also? (2)
6.   How is the sex of the child determined in human beings? (2)
7.   What is the speciation? How does it occur? (2)
8.   Define evolution. State Darwin�s theory of evolution. (5)
9.   What are the various evidences in factors of evolution? (4)
10.   Which of the following pair of sex chromosomes produces a male and a female child- XX or XY? (1)


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