9. In test cross, F1 progeny is crossed with (1) Either of the parent (2) Recessive parent (3) Dominant parent (4) Heterozygous parent Concept of a test cross A test cross is […]
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CSIR NET Life Science Previous Year Questions and Solution on Genetics
What pattern do Mendelian alleles show?
8. All of the mendelian alleles for different trait showed (1) Epitasis (2) Co-dominance (3) Incomplete dominance (4) Dominance and recessiveness Explanation: In Mendel’s classic pea plant experiments (seed shape, […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Typical Mendelian dihybrid F2 ratio
7. Typical mendelian dihybrid ratio for F2 generation is- (1) 9:3:3:1 (2) 9:7 (3) 1:2:1 (4) 9:7 Dihybrid Cross: 9:3:3:1 Ratio Genes and Alleles A dihybrid cross tracks two genes, […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Why Mendel’s laws apply mainly to nuclear genes
6. Mendel’s laws of inheritance is applicable to- (1) Nuclear genes (2) Plasmid genes (3) Mitochondrial genes (4) Plastid genes Why nuclear genes […]
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, […]
