THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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translocation
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nondisjunction
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DNA replication
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RNA transcription
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Detailed explanation-1: -The replication of DNA occurs during the synthesis phase, or S phase, of the cell cycle, before the cell enters mitosis or meiosis.
Detailed explanation-2: -The S phase of a cell cycle occurs during interphase, before mitosis or meiosis, and is responsible for the synthesis or replication of DNA. In this way, the genetic material of a cell is doubled before it enters mitosis or meiosis, allowing there to be enough DNA to be split into daughter cells.
Detailed explanation-3: -(i) Mitosis is preceded by one cycle of DNA replication and meiosis is preceded by two cycles of DNA replication. (ii) In sexually reproducing organisms, meiosis is the only type of cell division observed. (iii) Meiotic cell division is essential for the production of haploid gametes.
Detailed explanation-4: -Before cells can divide, either through mitosis or meiosis, they must go through interphase. In interphase, the contents of the cell double. All of the chromosomes are copied, and the organelles are doubled as well.
Detailed explanation-5: -o, the correct statement is ‘In both mitosis and meiosis the replication of DNA and chromosomes occurs at the same stage. ‘