61. Pentadactylity is a dominant trait, yet many individuals having single dominant alleles does not show any sign of polydactylity due to (1) Incomplete penetrance (2) Variable expressivity (3) Co […]
Tag: CSIR NET Life Science Previous Year Questions and Solution Genetics
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CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Understanding Sex-Influenced Inheritance of Horns in Sheep
60. In some sheep, horns are produced by an autosomal allele, ‘H’ that is dominant in males and recessive in females. H+H+ individuals are hornless. A horned female is crossed […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Sex-Linked Inheritance of Eye Color
59. In an organism, allele for red eye colour is dominant over the allele for white eye colour. A cross is made between a white eyed male and a red […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Understanding Male-Female Ratios in Drosophila with X-Linked Temperature-Sensitive Lethal Mutation
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 […]
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) […]
