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38. Which one of the following statements is correct? (1) Epigenetic memory depends on DNA acetylation by trithorax group of proteins (2) An epigenetic change could be inherited from a […]

37. A mouse carrying two alleles of insulin-like growth factor II (igf2) is normal in size; whereas a mouse that carries two mutant alleles lacking the growth factor is dwarf. […]

36. Following statements were made about imprinting in the human genome. A. Imprinting control centre (lC) harbors part of the SNRPN gene. B. Imprinting of genes in an individual cannot […]

35. A gene inherited from mother is not expressed the offspring, but the same gene when inherited from father is expressed in both male and female offspring. This phenomenon is […]

34. In knockout mice experiment was performed for germline transmission of gene A, null allele from a male chimera shows retarded growth of all mutant heterozygotes. On inbreeding animals produced […]

33. The pattern of genomic imprinting is maintained from one generation to another by (1) Phosphorylation of DNA (2) Methylation of DNA (3) Acetylation of DNA (4) Glycosylation of DNA […]

32. Dosage compensation in mammal females is achieved by (1) Methylation of one X chromosome (2) Hyper activation of one X chromosome (3) Elimination of one X chromosome (4) Hypoactivation […]

31. Dosage compensation in drosophila is achieved by- (1) Selective elimination of maternal X chromosome (2) Heterochromatization of paternal X chromosome (3) Hyperactivation of maternal X chromosome (4) Hyperactivation of […]

30. Dosage compensation occurs in- (1) Insects and mammals (2) Reptiles and mammals (3) Reptiles and Aves (4) Insects and reptiles Dosage compensation is a genetic mechanism that equalizes the […]

29. Dosage compensation in drosophila is mediated by (1) Inactivation of one X chromosome in female (2) Hyper activation of one X chromosome in male (3) Hypo activation of both […]