6. Mendel’s laws of inheritance is applicable to- (1) Nuclear genes (2) Plasmid genes (3) Mitochondrial genes (4) Plastid genes Why nuclear genes […]
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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 Genetics
Rh-positive father × Rh-negative mother: what Rh type can the children have?
5. A Rh + ve male marries a Rh-ve female, their progenies will be- (1) Rh +ve only (2) Rh -ve only (3) Can be Rh +ve or –ve (4) […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Phenotypic ratio in a PP × pp monohybrid cross
4. When dominant purple color flower (PP) are crossed with recessive white (pp), then the progenies will have the ratio of Purple: White is (1) 1:2:1 […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Calculating number of red, wide-leaf plants in a PpLl × PpLl dihybrid cross
3. If P is for purple (dominant) and p for red (recessive) and L for wide leaf (dominant) and l for narrow leaf (recessive). When a cross is made between […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Why Mendel’s monohybrid 3:1 ratio comes from chromosome separation in meiosis
2.Mendel’s monohybrid ratio is outcome of (1) Independent assortment of genes (2) Hardy-Weinberg law (3) Uncontrolled matting (4) Separation of homologous chromosomes during meiosis Explanation: In a monohybrid cross, F1 […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Phenotypic ratio in the F2 generation of a monohybrid cross
1. When a F1 generation of a monohybrid cross is allowed self-fertilize, the expected phenotypic ratio is (1) 2:1 (2) 3:1 (3) 4:1 (4) 3:4 Monohybrid Cross: Detailed Explanation […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
What condition best defines autopolyploidy in plants?
Whichone of the following conditions represents autopolyploidy? (1) More than two sets of chromosomes. both of Which are form the same parental species. (2) More than two sets of chromosomes, […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Why Triticum aestivum (bread wheat) is an allopolyploid
48. Triticumaestivum is an example of (1) Allopolyploid (2) Autopolyploid (3) Chromosome doubling (4) Auto-allopolyploid Core explanation Common bread wheat, Triticum aestivum, has genome composition AABBDD with 2n = 42. These three […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Chromosome number changes in diploid species: autotriploid, allotetraploid, monosomy, double trisomy, and nullisomy
47. A species of plant (species 1) is diploid (2n = 6) with chromosomes AABBCC and a related species (species 2) is also diploid (2n = 4) with chromosomes PPQQ. […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
How to find sporophytic ploidy from a 6N endosperm and a backcross
46. Two near inbred parental lines P1 and P2 of an angiosperm species are crossed to produce F1 seeds in which. theplojdv of the endosperm is 6N. If plants generated […]
