HEREDITY – MCQ QUIZ

2. Which out of the following is an example of Discontinuous variation?

3. Select which is a Continuous variation?

4. Pick the wrong point about Continuous variation.

5. Select the wrong statement about Discontinuous variation.

6. Who is called as the father of modern genetics?

7. I cross a true breeding tall plant with a true breeding dwarf plant. Which statement about this cross is false if Tall is the dominant trait.

8. A student carried out a monohybrid experiment with 40 pea plants. He did not obtain the expected ration of 3:1 in the F2 generation. Why is the experimental result different?

9. Pick the correct statement -

10. Different forms of the same genes are called as -

11. Which statement is wrong?

12. What is ratio between the dominant phenotype and recessive phenotype in the F2 generation in a monohybrid cross?

13. Which statement about test cross is wrong ?

14. When a certain variety of black chickens is crossed with white chickens, all the resulting are checkered black and white . What is correct about this pattern of inheritance?

15. If two pure bred flowering plants, one with red and one with white flowers are crossed, all F1 generation plants had white flowers with red spots. If the F1 generation plants are self - pollinated,  what is the percentage of white flower plants and red flower plants in the F2 generation?

16. In a human cell, how many autosomal chromosomes or autosomes are there?

17. In a human cell, how many sex chromosomes or allosomes are there?

18. ABO blood group system is an example of -

19. Normal skin pigmentation is caused by a dominant allele A. Albinism is homozygous recessive (aa). From the below crosses, when are the chances of getting an albino offspring 100%?

20. Coat colour in rabbit is controlled by the three alleles. C( allele for normal coat colour), Ch( allele for himalayan coat colour) and Ca ( allele for albino coat colour) . C is dominant over Ch and Ca. Ch is dominant over Ca.  A rabit breeder suspects that one of the normal coat rabbit is not homozygous? He crosses it with an albino rabit. What is the genotype of this albino rabit?

21. The theory of Evolution by Natural selection was put forward by -

22. One common ancestor evolves into different species depending on the environmental conditions they are exposed is called as -

23. Mutation is the sudden change in the genetic make up of an organism. Substances which cause mutations are called mutagens. Which of the following is not a mutagen?

24. Choose the wrong statement.

25. Choose the wrong statement -

26. Choose the correct statement.

27. Choose the wrong statement.

28. Look at the karyogram given below. What is sex of the baby? Is the baby suffering from any genetic disorder ?

29. If a male and female who are carriers of Sickle cell anaemia allele marry, what is the possibility of them having a normal child?

30. A woman with blood group O marries a man with AB blood group. What is the chance of the couple having a baby with O blood group.

31. A woman whose blood group was O marries a man of blood group A. Assuming the father is heterozygous, what is the propability of their first child having blood group A?

32. A woman whose blood group was O marries a man of blood group A. Assuming the father is heterozygous, what is the propability of their first two children  having blood group A?

33. Select the false statement.

34. Which 2 statements about continuous variation are correct?

1. The heights of adult humans will partly depend on the quality of their diets when young.
2. The faster period of growth in humans is in the embryo.
3. A group of adult males had weights ranging from 155 - 220 cm.
4. Humans have stopped growing by the time they are 22 years old.
5. Humans grow taller during babyhood and childhood.

 

35. Which fertilisation would result in a child with Down's syndrome?

36. Which pair of gametes will result in a male with Down's syndrome?

37. In case we consider the variations in a group of birds, which of the following character is an example of discontinuos variation?

39. In rabbits, brown fur is dominant to white fur. Two rabbits, both heterozygous for fur colour , are mated and a litter is produced. The first three rabbits to be born have brown fur. What is the chance of the fourth one having white fur?

39. Which statement about the evolution of life on Earth is correct?

40. In terms of natural selection, what is the significance of the survival of the fittest in a tiger population?

41. A brown eyed man and a brown eyed woman have five children, three with brown eyes and two with five eyes. Which statement about this family is correct?

42. In mice, the allele for black fur colour is dominant to the allele for white fur colour. What does this mean in a mouse population?

43. Bacteria evolve resistance to the antibiotic penicillin by the process of natural selection. Which factor acts as the force for this natural selection?

44. Four children from different families are tested to identify their blood group. The blood group phenotypes of the four children are A, AB, B and O. Which couple are the parents of child with blood group AB?

45. A pedigree chart shows:

46. An extra finger in humans is rare but is due to a dominant gene. When one parent is normal and the other parent has an extra finger but is heterozygous for the trait, what is the probability that the first child will be normal?

47. Which blood type would not be possible for children of a type AB mother and a type A father?

48. Choose the wrong statement.

49. A mutation sometimes occurs in humans which causes each hand to have six fingers. The diagram shows how this condition is inherited in a family. What does the family tree show about the mutated allele?

50. A species of small mammalian herbivore lives in an isolated valley from which it cannot escape. Which of these environmental changes could lead to genetic changes within the population?