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प्रश्न
Can there be mitosis without DNA replication in S phase?
उत्तर
- Mitotic cell division cannot take place without DNA replication in S phase.
- Two important events take place during the S phase: one is the synthesis or duplication of DNA and the other is the duplication of the centriole.
- DNA duplication is important as it maintains the chromosome number in the daughter cells.
- Mitosis is an equational division. Therefore, the duplication of DNA is an important step
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संबंधित प्रश्न
Find examples where the four daughter cells from meiosis are equal in size and where they are found unequal in size.
Distinguish anaphase of mitosis from anaphase I of meiosis
List the main differences between mitosis and meiosis.
What is the significance of meiosis?
Mention whether the following statement is (T) Or (F). Give reason in support of your answer.
Crossing over between chromatids can occur only between homologous chromosomes.
The diagram given below represents a certain phenomenon which occurs during meiosis. Name and explain the phenomenon by using the terms homologous chromosomes, chromatids, crossing over.
Choose the correct answer:
Crossing over is a feature of ______________
Four daughter cells formed after meiosis are
Meiosis is evolutionary significant because it results in :
Genetic recombination is due to ______.
Give reason:
The children of the same parents, howsoever similar, are different from each other in certain aspects.
