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 […]
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
Risk of disability from a pericentric inversion heterozygote when crossing over is 26%
17. Fertilization of gametes containing chromosome with duplication or deletion often results in children with disabilities. What is the probability of a couple where the male is karyotypically normal and […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Meiotic consequences of inversions and why they suppress crossing over
16. When gamete formation occurs in individuals heterozygous for an inversion, some of the following possibilities may occur: A. A pericentric inversion heterozygote results in an acentric and a dicentric […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Paracentric inversion crossover
15. An individual is having an inversion in heterozygous condition. The regions on normal chromosome are marked as A, B, C, D, E, F, G while the chromosome having inversion […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Which chromosomal change can move a gene to a new linkage group?
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 […]
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) […]
