58. A Drosophila male carrying an X-linked temperature sensitive recessive mutation that is lethal at 290C but viable at 180C is mated to: A. a normal female B. a female […]
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CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Understanding the Progeny Sex Ratio in Drosophila with a Recessive Sex-Linked Lethal Allele
57. The allele l in Drosophila is recessive, sex- linked and lethal’ when homozygous or hemizygous. If a female of the genotype Ll is crossed with a male, what is […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Drosophila Grey and Yellow Body Colour Cross
Consider the following crosses involving grey(wild-type) and yellow body colour true breeding Drosophila: Cross F1 Progeny F2 Progeny Cross 1 Grey female X yellow […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Drosophila Cross: Normal Wing Grey Body × Vestigial Wing Yellow Body – Sex Linkage and Autosomal Inheritance Explained
Drosophila melanogaster males with normal wing size and grey body colour is crossed with females having vestigial wings and yellow body colour. Vestigial wing and yellow body colour are recessive […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Understanding X-linked Recessive Inheritance
54. On basis of statement given below the mode of inheritance is • Mostly males are sufferer of disease • All male child of affected mother are diseased • Female […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Understanding Sex Linked Traits in Drosophila
53. A cross between a red eyed male fly and white eyed female fly produces red eyed female and white eyed male progenies. While reciprocal cross produces all offsprings with […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Understanding X-linked Recessive Disorders
52. Among the following which statement is NOT correct for X-linked recessive disorder ? (1) Female with such disorders ate rare (2) Males the diseased allele are always diseased (3) […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Understanding Sex-Linked Disorders
51. Among the following, which is sex linked disorder (1) Night blindness (2) color blindness (3) Cretinism (4) Myxedema Introduction: Sex-linked disorders are genetic conditions associated with genes located on […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Probability of Hemophilia in Grandson When Paternal Grandfather is Hemophilic
50. Paternal grandfather is hemophilic, what is probability of his grandson to be hemophilic (1) 1/2 (2) 1/4 (3) 1/8 (4) 0 The probability of a grandson being hemophilic when […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Probability of Son Being Color Blind with Color Blind Father and Normal Homozygous Mother
49. The probability of a son to be color blind for parent with colorblind father and normal homozygous mother would be (1) 0% (2) 25% (3) 50% (4) 100% The […]
