14. A mechanism that can cause a gene to move from one linkage group to another is (1) crossing over (2) inversion (3) translocation (4) duplication Concept: linkage groups and […]
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 CHROMOSOMES ABERRATIONS
Consequences of a single crossover in a paracentric inversion heterozygote
13. Following is the diagram of a paracentric inversion heterozygote ABCDEFG/ABFEDCG involved in recombination during meiosis I: The consequence of this recombination will be the formation of A. A dicentric […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Consequences of single crossover in a paracentric inversion heterozygote
12. Following is the picture of an inversion heterozygote undergoing a single crossing – over event The following statements are given towards explaining the consequences at the end of meiosis. […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Gamete types produced after single crossover in a paracentric inversion loop
The following diagram shows meiotic pairing in an inversion heterozygote and a point where single crossing over has occurred The resulting gametes produced may have A. the chromosome having normal […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Why inversions are called cross‑over suppressors
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 […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Why inversions are called crossover suppressors
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) […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Why inversions cause crossover suppression and position effects
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 […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Outcome of crossing over in a pericentric inversion heterozygote
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 […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Why some chromosomal inversions only survive as heterozygotes
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 […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Identifying chromosomal aberration pattern
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) […]
