Test-MCQ Class 10-NCERT -Science-Chapter 9-Test-3

1. A trait in an organism is influenced by

2. Select the group which shares maximum number of common characters

3. The two versions of a trait (character) which are brought in by the male and female gametes are situated on

4. Select the statements that describe characteristics of genes
(i) genes are specific sequence of bases in a DNA molecule
(ii) a gene does not code for proteins
(iii) in individuals of a given species, a specific gene is located on a particular chromosome
(iv) each chromosome has only one gene

5. In peas, a pure tall plant (TT) is crossed with a short plant (tt). The ratio of pure tall plants to short plants in F2 is

6. The number of pair (s) of sex chromosomes in the zygote of humans is.

7. The theory of evolution of species by natural selection was given by

8. Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that

9. Which of the following stood erect first ?

10. Scientific name of human is –

11. How life might have originated on earth was experimentally shown by

12. Which of these is homozygous recessive ?

13.  How many contrasting pairs of characters of pea plant were studied by Mendel ?

14. Wings of an insect and a bird are example of

15. Which of the following has lowest brain / body ratio ?

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