A cell at the telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at the telophase stage. There is no formation of the cell plate and thus the cell contains more chromosomes as compared to other dividing cells. This would result in:
Correct answer: D. Polyploidy
- A. Somaclonal variation
- B. Polyteny
- C. Aneuploidy
- D. Polyploidy
Explanation
Polyploidy is the phenomenon of the occurrence of more than two sets of chromosomes in the nucleus of a cell. Polyploidy is more common in plants. Polyploidy arises as a result of total non-disjunction of chromosomes during mitosis or meiosis. As in the cell observed by the student cell has a larger number of chromosomes so the phenomenon is called polypoidy.
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About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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