1. The sequence of gradual changes which takes place in the primitive organisms over millions of years in which new species are produced is known as

2. If a normal cell of human body contains 46 pairs of chromosomes then the numbers of chromosomes in a sex cell of a human being is most likely to be:

3. In the human blood grouping, the four basic blood types are type A, type B, type AB, and type O. They are:

4. What will be the number of chromosomes present in each gamete produced by the plants if the palisade cells of a species of plant contain 28 chromosomes in all?

5. The following results were obtained by a scientist who crossed the F1 generation of pure-breeding parents for round and wrinkled seeds.

From these results, it can be concluded that the actual number of round seeds he obtained was:

6. A cross between a tall plant (TT) and short plant (tt) resulted in progeny that were all tall plants as:

7. In peas, a pure tall plant (TT) is crossed with a pure short plant (tt). The ratio of pure tall plants to pure short plants in F2 generation will be:

8. In human males, all the chromosomes are paired perfectly except one. These unpaired chromosomes are:

(i) Large chromosome
(ii) Small chromosome
(iii) Y chromosome
(iv) X chromosome

9. Which of the following determines the sex of a child?

10. Which of the following pair of organ is not homologous?