1.
The theory of evolution of species by natural selection was given by:
2.
From the list given below, select the character which can be acquired but not inherited:
3.
In human males all the chromosomes are paired perfectly except one. This/These unpaired chromosome is/are: (i) Large chromosome (ii) Small chromosome (iii) Y-chromosome (iv) X-chromosome
4.
Two pea plants one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds produce F1 progeny that have round, yellow (RrYy) seeds. When F_{1} plants are selfed, the progeny will have new combination from the following: F2 (i) Round, yellow (ii) Round, green (iii) Wrinkled, yellow (iv) Wrinkled, green
5.
Select the correct statement.
6.
Which of the following statements is not true with respect to variation?
7.
Two pink coloured flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross will be:
8.
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
9.
The maleness of a child is determined by:
10.
According to the evolutionary theory, formation of a new species is generally due to:
11.
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:
12.
A zygote which has an X-chromosome inherited from the father will develop into a
13.
If the fossil of an organism is found in the deeper layers of earth, then we can predict that:
14.
Select the incorrect statement:
15.
A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because:
16.
New species may be formed if: (i) DNA undergoes significant changes in germ cells. (ii) Chromosome number changes in the gamete (iii) There is no change in the genetic material (iv) mating does not take place
17.
A basket of vegetables contains carrot, potato, radish and tomato. Which of them represent the correct homologous structures?
18.
In peas a pure tall plants (TT) is crossed with a short plant (tt). The ratio of pure tall plants to short plant in F2 is
19.
Exchange of genetic material takes place in:
20.
Select the group which shares maximum number of Common characters:
21.
The two versions of a trait (character) which are brought in by the male and female gametes are situated on:
22.
If a round, green seeded pea plant (RR yy) is crossed with wrinkled, yellow seeded pea plant, (rr YY) the seeds produced in F1 generation are:
23.
A trait in an organisms is influenced by:
24.
The number of pairs(s) of sex chromosomes in the zygote of human is:
25.
Which of the following statement is incorrect?
