1.
Which of the following statements is not true with respect to variation?
2.
The theory of evolution of species by natural selection was given by:
3.
Select the correct statement.
4.
A zygote which has an X-chromosome inherited from the father will develop into a
5.
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
6.
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
7.
If the fossil of an organism is found in the deeper layers of earth, then we can predict that:
8.
Which of the following statement is incorrect?
9.
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:
10.
A basket of vegetables contains carrot, potato, radish and tomato. Which of them represent the correct homologous structures?
11.
A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because:
12.
Select the group which shares maximum number of Common characters:
13.
Select the incorrect statement:
14.
From the list given below, select the character which can be acquired but not inherited:
15.
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
16.
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
17.
Exchange of genetic material takes place in:
18.
The two versions of a trait (character) which are brought in by the male and female gametes are situated on:
19.
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
20.
The maleness of a child is determined by:
21.
Two pink coloured flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross will be:
22.
A trait in an organisms is influenced by:
23.
According to the evolutionary theory, formation of a new species is generally due to:
24.
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:
25.
The number of pairs(s) of sex chromosomes in the zygote of human is:
