Courtesy

Dr.Bejoy John

Division of Animal Genetics

I.V.R.I, Izatnagar, Bareilly,

UP 243122

Email: drbejoyjohn@yahoo.com

1. Scientist who coined the term Genetics

2. What is the contribution of Wilhem Johanssen to Genetics?

3. Theory of pangenesis was proposed by ------------

4. The concept of Genotype and Phenotype was introduced by -----

5. Chromosome theory of heredity was proposed by

6. Germ plasm theory was put forward by

7. The  nationality of Gregor Mendel who is regarded as “father of genetics”

8. In 1900, Mendel’s work were rediscovered by -------

9. Law of Segregation is also known as-------

10. Human blood group type is an example of -----

11. ------ and ------- are two recessive traits that are inherited.

12. What is the ratio due to double recessive epistasis?

13. Linkage was first observed by--------- in sweet pea.

14. Crossing over occurs in the --------- stage of meiosis.

15. Chromosome number in fowl is ---------

16. Epistasis works at------ level where as Dominance always work at the ------level

17. What is penetrance ?

18. The degree to which a genotype is expressed phenotypically is called

19. Name the scientist who first discovered chromosomes

20. Who coined the term Chromosomes?

21. The organelle from which the r-RNA is synthesized 

22. Metacentric chromosomes assume which shape?

23. Pairing of the homologous chromosomes takes place at ------- stage

24. Coiled filament that runs throughout the length of the chromosome is called

25. Darkly stained regions of  the chromosomes at prophase is called ----

26. Sex chromatin are rich in ----------------- 

27. Where are Lampbrush chromosomes found?

28. The Octate structure in the nucleosome consists of ----

29. Balbiani rings or Chromosomal puffing are present in-----------

30. Interphase of the cell cycle consists of ---------

31. Complete synaptonemal complex is found in which stage?

32. Sythesis of DNA is completed in -----stage of Meiosis

33. The unit representing a map unit between  the linked gene……

34. Phenomenon by which crossing over in one region suppresses crossing over in adjacent region----

35. What is coefficient of coincidence ?

36. ----- is measured using coefficient of coincidence ?

37. In fowl females  are heterogametic T / F

38. Barred plumage in poultry is a type of ----

39. Genic balance theory of sex determination was proposed by -------

40. ----- confirms the presence of barr body in female somatic cells.

41. -------syndrome which is caused by deletion of short arm of chromosome no 5

42. Point mutation was first noticed by ------- in Ancon sheep?

43. World’s first chromosome map was produced by-------

44. The no . of chromosomes in Drosophila is --------

45. Haploid-Diploid type of sex determination is seen in ---------

46. In Drosophila sex is determined by the ratio of X chromosome to --------

47. Polyploids created by chromosome duplication is called --------

48. The presence of extra chromosome sets in a cell is called as -------------

49. which is the stain used for G banding----

50. The chart of images of chromosomes is called ----------

 ANSWERS

1.William Bateson  

2.Coined 'allele' and 'genes'

3.Darwin

4.W Johanssen

5.W S  Sutton

6.Weismann

7.Austria

8.Hugo de Vries, Carl Correns Eric von Tschermack

9.Law of purity of gametes

10.Multiple alleles  

11.Alkaptonuria and Phenylketonuria

12.9:7 

13.Bateson and Punnet

14.Pachytene

15.78

16.Intergenic, Intragenic

17. % of individuals with a given genotypes which exhibits the related phenotypes.

18.Expressivity

19.Strassburger

20.Waldeyer

21.Nucleolus

22.“ V “ shape

23. Zygotene

24.chromonema

25.heterochromatin

26.Heterochromatin  

27. Primary oocytes of amphibians and spermatocyte of  Drosophila.

28. Two molecules each of H2A, H2B, H3 and H4.

29.Salivary gland cells of  Drosophila.

30.G1, S and G2

31.Zygotene

32.Zygotene

33.CentiMorgan

34.Interference

35.% of observed cross overs/ % of expected crossovers (RATIO)

36. Degree of interference

37.T

38.Sex linked character

39.C.B.Bridges

40.Lyon's hypothesis

41.Cridu-chat syndrome

42.Seth Wright

43.Alfred Sturtevant

44.8

45.Honey bees and wasps

46.Autosomes

47.Autopolyploid

48.Polyploidy

49.Giemsa

50.Karyotype

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