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The genome of onion has 8 chromosome. In a root tip cell undergoing anaphase the number of chromosome will be
Asked by anjanakurup728 | 16 Oct, 2019, 09:00: PM
Expert Answer
- The main plant body of onion is diploid (2n). Since, n = 8, therefore 2n= 16.
- Thus, the normal dividing root tip cell will have 2n = 16 chromosomes.
During cell division of root tip cell, the DNA doubles in S phase of interphase of cell cycle. - Thus, during anaphase (karyokinesis), the parent chromosomes and newly formed chromosomes (synthesised during S phase) separate and the cell will have 32 chromosomes at this stage. Hence, at anaphase cell will have 32 chromosomes.
- After completion of cell division (cytokinesis), two daughter cells will be formed. Each daughter cell will receive equal number of chromosomes as that of parent cell (here 16 chromosomes each).
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