MCQs On Evolution And Genetics

EVOLUTION And GENETICS

1. The idea of inheritance of acquired character was proposed by;
a. Linnaeus
b. Lamarck
c. Darwin
d. Wallace

2. From South America Darwin collected number of types of Finches;
a. 20
b. 11

c. 15
d. 13

3. Which one of the following mammals live only in America?
a. Armadillos
b. Elephant
c. Opossum
d. Echidna
4. Which one of the following Island is present near the coastline of South America?
a. Cape verd
b. Finland
c. Galapagos
d. Iceland

5. The oldest known fossils are of;
a. Pisces
b. Prokaryotes
c. Protozoans

d. Algae

6. Archaeobacteria can tolerate temperature up to;
a. 100o C
b. 150 oC
c. 110 oC
d. 120 oC

7. Most fossils are found in;
a. Sedimentary rocks
b. Ingeous rock
c. Black soil
d. Lava flowa

8. Charles Darwin's book, On the origin of species by Means of Natural Selection, was first published in;
a. 1779
b. 1831
c. 1859
d. 1959

9. The primary mission of the "voyage of H.M.S.beagle" (1831 -- 1836) was to;
a. Carry arms to the new world
b. Chart the S.American coastline
c. Find out how many species there were in the world
d. Disprove Lamarck's theory of inheritance
10. The wing of bird and the forelegs of a horse are;
a. Vestigial structures
b. Analogous structures
c. Phylogenetic structures
d. Homologous structures

11. The struggle for existence is a consequence of;
a. Each organism leaving more offspring than needed to replace it self
b. The inevitable difficulty of coping with climatic conditions
c. Territories and dominance hierarchies
d. Innate competitive tendencies

12. The idea of common descent was first suggested to Darwin by his observations on;
a. Comparative embryology
b. Blood groups of birds
c. Geographical distribution of species
d. Human pedigrees

13. Fossil record shows that the earliest known vertebrate fossils were of;
a. Mammals
b. Fishes
c. Amphibians
d. Reptiles

14. The structures which have common origin but different function is;
a. Vestigial structure
b. Analogous structure
c. Adaptive structure
d. Homologous structure

15. In terrestrial vertebrates, the gills are modified to form;
a. Lungs
b. Eustachian tube
c. Ear muscles
d. Larynx

16. A respiratory protein found in all aerobic species is the;
a. Cytochromes-c
b. Cytochromes-b
c. Cytochromes-a
d. Cytochromes-a3

17. which  one of the following cannot change allelic frequency?
a. Migration
b. Genetic drift
c. Random mating
d. Selectiion

18. The wings of a bird and the wings of an insect are;
a. Analogous structures
b. Phylogenetic structures
c. Homologous structures
d. Vestigial structures

19. The best test of the relatedness of two species is in the similarity of their;
a. Anatomy
b. Courtship behaviour
c. Development
d. DNA & Protein

20. The unit of evolution is now known to be the;
a. Individual
b. Population
c. Family
d. Species

21. The total collection of genes, at any one time, in a unit of evolution is called the;
a. Genotype
b. Phenotype
c. Gene pool
d. Multiple-allelic group

22. A potential danger to a population that has been greatly reduced in number is the;
a. Loss of genetic variability
b. Tendency towards assertive mating
c. Reduced gene flow
d. Hardy-Weinberg disequlibrium

23. The human blood groups -- A, B, AB, and O -- are an example of a;
a. Dimorphism
b. Mutation
c. Gradeint of diploidy
d. Allelomorphism

24. All alleles originate from;
a. Crossing over
b. Mutations
c. Gene flow
d. Non-disjunction

25. A beneficial allele increases more rapidly in frequency, if it is;
a. Dominant
b. Recessive
c. Recently mutated
d. Rare

26. Biologist who study the sequence of organisms in the fossil record are;
a. Taxonomists
b. Phycologists
c. Paleobiologists
d. Mycologists

27. The richest source of fossils is;
a. Igneous rock
b. Granite
c. Basalt
d. Sedimentary rock

28. How many possible phenotypes are there for the "ABO" blood groups?
a. 4
b. 6
c. 8
d. 16

29. The genotypic expression seen in a person of blood group "AB" is called;
a. Dominant-recessive
b. Incomplete dominance
c. Co-dominance
d. Over-dominance

30. The pelvis and the leg bones of a snake are;
a. Homologous structures
b. Vestigial structures
c. Adaptive structures
d. Analogous structures

31. A child with blood-group genotype IA / IB is born of a woman with genotype IB / IB , the father could not be a man of genotype;
a. IA / IB
b. IA / IA
c. IB / IB
d. IA / i

32. The locus  of gene  that controls the "AOB" blood type is present on chromosome number;
a. 11
b. 21
c. 7
d. 9

33. The pattern of sex determination found in protenor hug is;
a. XO -- XX
b. WZ -- ZZ
c. Honey bee method
d. XY -- XX

34. In monochromacy which types of light receiving cone cells are absent?
a. Blue -- Green
b. Red -- Blue
c. Red -- Green
d. Red -- Yellow

35. Which one is not correct for Drosophila melanogaster?
a. XXY -- is fertile female
b. XO -- fertile male
c. XX -- is female
d. XY -- male

36. Which one is not correct for recessive sex-linked inheritance?
a. Gene for eye colour is present on "X" sex chromosomes
b. Y -- chromosome is inert
c. Female can be homozygous or heterozygous
d. Sex - linked traits are more common in females as compared to males

37. The genes for blue Opsin protein are present on autosomal chromosomes number;
a. 07
b. 11
c. 09
d. 21

38. A woman receives her " X " chromosomes from;
a. Her mother only
b. Both her mother & her father
c. Her father only
d. Extra-nuclear DNA in her mother's egg

39. When a mutation is limited to the substitution of one nucleotide pair for another, it is called a;
a. Point mutation
b. Transiocation
c. Base inversion
d. Sugar-phosphate deletion

40. The creation of mutations is called;
a. Evolution
b. Radiation
c. Mutagenesis
d. Saltatory changes

41. The father of a girl is hemophilic but mother is normal.she may be;
a. hemophilic
b. Carrier
c. Normal
d. None of these

42. Genes not located within the nucleus are almost always located in the;
a. Cytosol
b. Cell membrane
c. Cytoskeleton
d. Organelles

key
1.b
2.d
3.a
4.c
5.b
6.d
7.a
8.c
9.b
10.d
11.a
12.c
13.b
14.d
15.b
16.a
17.c
18.a
19.d
20.b
21.c
22.a
23.d
24.b
25.a
26.c
27.d
28.a
29.c
30.b
31.b
32.d
33.a
34.c
35.b
36.d
37.a
38.b
39.a
40.c
41.b
42.d