Tag: CSIR NET Life Science Previous Year Questions and Solution Genetics

10. Inversions are considered as cross-over suppressors because: (1) Homozygous inversions are lethal and thus they do not appear in next generation. (2) Inversion heterozygotes, i.e., one copy having normal […]

9. Inversion is termed as crossover suppressor because (1) Single crossing over within an inversion loop, leads to defective (deleted and duplicated) crossoverchromosomes and mortality of zygotes carrying them. (2) […]

8. The structural change which leads into crossover suppression and position effect is (1) Deletion             (2) Duplication (3) Inversion          (4) Translocation Concept: why inversions fit both features A chromosomal inversion occurs when […]

7. What is outcome after single crossover between chromosomes having pericentric inversion and normal? (1) Segmental Deletion and Duplication (2) Bridge formation (3) Ring formation (4) Acentric and dicentric chromosomes […]

6. Chromosomal inversions are balanced rearrangements and thus do not change the overall amount of genetic material. While inversions can exist in homozygous condition, some only exist as heterozygotes. In […]

4. Suppose a chromosomal aberration in a chromosome AB.CDEFG leads to AB.CDEFCDFEG. The probable reason is (1) Duplication and followed by EF inversion (2) Duplication followed by pericentric inversion (3) […]

3. Chromosome aberration characterized by lack of crossing over, pseudo-dominance and non-reversal of mutation occurs in- (1) Inversion               (2) Deletion (3) Translocation       (4) Duplication […]

2. Based on the image given below, select the option that describes it correctly: (1) Q-banded normal human karyotype. (2) G-banded human karyotype depicting aneuploidy. (3) C-banded karyotype depicting Klinefelter […]

Column X and Y of the following table list some treatment methods, reagents, and events that are related to human lymphocyte culture, and banding/ karyotyping of human chromosomes. Which one […]