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I have created this blog for students of class 10 of Gujarat secondary Education Board (GSEB). Questions are based on the text book of Gujarat Board. Hope it will help other students, too. For descriptive Question-Answer you can visit my another blog scienceandtechnology-manojsir.blogspot.com

Wednesday, October 23, 2013

Chapter 16 : HEREDITY AND EVOLUTION

Choose Appropriate Alternative



  1. The occurrence of differences among the individuals of same species is due to _____.
    [A] transition [B] variation [C] development [D] evolution
  2. The continuity of features from one generation to another is known as ______.
    [A] evolution [B] mutation [C] heredity [D] generation
  3. On which of the following plant species had Mendel worked?
    [A] Zea Mays [B] Pisum Sativum [C] Cassia Tora [D] Phaseolus Mungo
  4. When Mendel crossed Tall plant with Dwarf plant, what was the proportion of Dwarf plant in F2 generation?
    [A] 75% [B] 25% [C] 60% [D] 40%
  5. In human beings, sex is determined by ______
    [A] cell [B] tissues [C] genes [D] organelles
  6. The human species has genetic roots in ______.
    [A] India [B] America [C] Africa [D] Australia
  7. The organs which perform different functions but have the same basic structure are known as ______.
    [A] homologous organs [B] analogous organs 
[C] homolytic organs [D] analytic organs
  8. If the fossil of an organism is found in the deeper layers of earth, then we can predict that...
    [A] the extinction of organism has occurred recently.
[B] the extinction of organism has occurred thousands of years ago.
[C] the fossil position in the layers of earth is not related to its time of extinction. 
[D] time of extinction cannot be determined.
  9. New species may be formed if :
    1. DNA undergoes significant changes in germ cells.
    2. there is no change in the genetic material.
    3. mating does not take place.

    [A] (i) and (ii) [B] (i) and (iii) [C] (ii) and (iii) [D] (i),(ii) and (iii)
  10. The presence of which of the following types of organs in two animals indicates that they are not derived from a common ancestor?
    [A] Homologous organs [B] Excretory organs 
[C] Analogous organs [D] Reproductive organs
  11. Which pair of the following is not homologous?
    [A] forelimbs in humans & lizard [B] forelimbs of lizard & frog 
[C] wings of butterfly & bat [D] wings of bat & bird
  12. _______ is the science of heredity and evolution.
    [A] Reproduction [B] Genetics [C] Physiology [D] Anatomy
  13. Which of the following is a true statement?
    [A] DNA is a segment of a gene.
[B] A gene is a molecule made up of many DNA units.
[C] The gene is a unit of heredity.
[D] Each DNA has one specific gene on it.
  14. Which of the following is true?
    [A] X-chromosome and Y-chromosome have same size.
[B] X-chromosome is smaller in size than  the Y-chromosome.
[C] Y-chromosome is smaller in size than  the X-chromosome.
[D] All three of (A), (B) and (C) are possible.
  15. Which of the following is not an acquired trait?
    [A] Ability to speak a particular language. 
[B] Cut tail of a mouse 
[C] Ability of a man to swim
[D] Ability to reproduce
  16. Speciation means...
    [A] development of a new species from existing one
[B] mixing of species
[C] sustenance of a species forever 
[D] end to the existence of a species
  17. The age of a fossil can be determined by...
    [A] Carbon Dating Technique [B] geographical conditions 
[C] Mass spectrography     [D] colour of fossil
  18. First of all the eye was formed in...
    [A] paramoecium [B] euglena [C] octopus [D] planaria
  19. Birds are very closely related to...
    [A] fish [B] reptiles [C] insects [D] planaria
  20. Wild cabbage is the ancestor for ______ by artificial selection.
    [A] broccoli [B] cauliflower [C] kohlrabi [D] all three
  21. The cells in human female have chromosomes of the type______.
    [A] 22 + X [B] 22 + Y [C] 44 + XX [D] 44 + XY
  22. The cells in human male have chromosomes of the type ______.
    [A] 22 + X [B] 22 + Y [C] 44 + XX [D] 44 + XY
  23. The ovum produced by a human female has chromosomes of the type ______.
    [A] 22 + X [B] 22 + Y [C] 44 + XX [D] 44 + XY
  24. If the sperm having _____ chromosome fertilizes an ovum, then the zygote develops in to ______.
    [A] X, male [B] Y, female [C] X, female [D] XY, female
  25. If characters of T are expressed in F1 generation by Tt, then T is said to be...
    [A] recessive gene [B] dominant gene [C] alternate gene [D] only gene
  26. What type of plant is developed if crossing is made between plant having TT and plant having tt genes?
    [A] Tall and dwarf plants [B] All tall plants [C] All dwarf plants [D] None of these
  27. What is the ratio of monohybrid cross in F2 generation?
    [A] 11 : 3 [B] 3 : 2 [C] 2 : 1 [D] 3 : 1
  28. What percentage is possessed by tall plants in monohybrid experiment?
    [A] 100% [B] 75% [C] 50% [D] 25%
  29. What can be the genetic composition for yellow colour and round seeds?
    [A] YYRR [B] YYrr [C] yyRR [D] yyrr
  30. The genes for green colour and wrinkled seeds are...
    [A] YYRR [B] YYrr [C] yyRR [D] yyrr
  31. The genes for yellow colour and wrinkled seeds are ...
    [A] YYRR [B] YYrr [C] yyRR [D] yyrr
  32. The genes for green colour and round seeds are...
    [A] YYRR [B] YYrr [C] yyRR [D] yyrr
  33. The ratio for dihybrid cross experiments is...
    [A] 13:1:1:3 [B] 11:1:1:3 [C] 3:1:1:11 [D] 9:3:3:1
  34. Which isotope of carbon is used to determine the age of fossils?
    [A] 11C [B] 12C [C] 13C [D] 14C
  35. Which is the oldest variety of cabbage by evolution?
    [A] Cabbage [B] Wild cabbage [C] Cauliflower [D] Kale
  36. What is formed if evolution of only leaves takes place in wild cabbage?
    [A] Cabbage [B] Wild cabbage [C] Kale [D] Kohlrabi
  37. If flower development in wild cabbage is arrested and made sterile, it develops into...
    [A] cabbage [B] wild cabbage [C] cauliflower [D] Kale
  38. What is meant by F1 generation?
    [A] Parent generation [B] First progeny [C] Second Progeny [D] None of these
  39. The father and the mother both show the presence of black eyes. In their children two girls were having black eyes but one girl was having a brown eye.What could be the genes in both parents' gametes? In this case black eye is dominant(B) over brown eye(b).
    [A] Father-BB, mother-bb [B] Father-bb, mother-BB 
[C] Father-Bb, mother-Bb [D] Father-bb, mother-bb
  40. In F-2 generation of plants, _____% plants were dwarf and _____% plants were tall in Mendel's experiment.
    [A] 50%, 50% [B] 25%, 75% [C] 75%, 25% [D] 100%, 0%
  41. Certain farmers selected the swollen portion of wild cabbage and developed a new variety called...
    [A] cauliflower [B] kohlrabi [C] kale [D] broccoli

  42. [A][B][C][D]


ANSWERS


(1) B (2) C (3) B (4) B (5) C (6) C (7) A (8) B (9) B (10) C (11) C (12) B (13) C (14) C (15) D (16) A (17) A (18) D (19) B (20) D (21) C (22) D (23) A (24) C (25) B (26) A (27) D (28) B (29) A (30) D (31) B (32) C (33) D (34) D (35) B (36) A (37) C (38) B (39) D (40) B (41) B
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1 comment:

  1. UnknownJune 5, 2020 at 10:53 AM

    Sir,pl check answer for Q-26.right answer will be 'B'.
    For Q-39, right answer will be'C'.
    For Q-37,in case of arrested flower development ans will be broccoli and for sterile flower ans will be cauliflower.So right ans will be "broccoli and cauliflower" but not given in options.

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