3. In genetic map, distance between two genes is measured in units of (1) cM (2) A0 (3) bp (4) nm Title: Understanding Genetic Map Distance: Units and Their Significance […]
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CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES (62)
CSIR NET Life Science Previous Year Questions and Solution on GENE MAPPING METHODS
Understanding the Genetic Cross of Long and Full Endosperm with Short and Shrunken Endosperm in Maize
2. When a cross is made between dominant long and full endosperm (LLSS) and recessive short and shrunken endosperm (Ilss). The progeny obtained 98.3 % were long and full endosperm […]
CSIR NET Life Science Previous Year Questions and Solution on GENE MAPPING METHODS
Frequency of Crossing Over is Directly Proportional to Distance Between Genes
1. Frequency of crossing over is directly proportional to- (1) Length of chromosomes (2) Number of genes (3) Distance between genes (4) Number of chromosomes Frequency of crossing over is […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Understanding Polydactyly Penetrance
62. Human polydactyly traits having extra fingers or toes are caused by a dominant allele. In a screening it was found that out of 42 individuals having an allele for […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Understanding Pentadactylity and Its Incomplete Penetrance
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 […]
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 […]
