The following statements were made regarding chromosome pairing (shown in the figure below) and subsequent segregation during meiosis-I in the reciprocal translocation heterozygote: A. Three ways of segregation tn Anaphase […]
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
Meiotic outcome of a reciprocal translocation heterozygote
26. A reciprocal translocation heterozygote at the end of meiosis I generate (1) An acentric and a dicentric chromosome (2) Viable gametes with deletions and duplications (3) Viable gametes with […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Why can a normal man have 45 chromosomes (44 + X)?
25. A normal man was found to have 45 chromosomes (44+X), the probable reason is- (1) Deletion (2) Translocation (3) Ecentric Fission (4) […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Why rare XX males and XY females arise in humans
24. In humans, XX males and XY females are rare, such rare sexes are due to (1) Deletion of X chromosome (2) Deletion of Y chromosome (3) XY translocation (4) […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Alternate segregation in a translocation heterozygote
23. If both translocated arms in single translocation heterozygote moves to one pole, then segregation is called (1) Alternate (2) Adjacent (3) Linear (4) Uniform Explanation of options: (1) Alternate […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Meiotic consequences of reciprocal translocation in Burkitt’s lymphoma (t(8;14))
22. In Burkitt’sLymphoma a reciprocal translocation between chromosome 8 and 14 is observed. If an individual is heterozygous for this translocation, the consequence in meiosis Will be as follows: A. […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Cruciform chromosome structure in meiosis – which aberration causes it?
21. A cruciform structure of chromosome during meiosis is a characteristic feature of: (1) Translocation (2) Inversion (3) Deletion (4) Duplication Detailed explanation of options: Translocation – correct In a […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Which chromosome aberration changes gene order but not linkage group?
20. Which of the following illustrations explain the correct pairing preceding recombination between a chromosome (ABC•DEFG/ABC•DEFG) and its inverted homologue (ABC•DGFE/ABC•DGFE). The dot in genotype represent the centromere. Concept A […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Which chromosome aberration changes gene order but not linkage group?
19. A chromosome aberration leads to change in the order of genes in a genetic map but does not alter its linkage group. This is due to (1) translocation. (2) […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Meiotic consequences of a homozygous paracentric inversion
18. An individual is having a paracentricinversion (denoted by the region f-e-d, marked by arrows) in homozygous condition. The meiotic consequences of inversion can be: A. generation of an acentric […]
