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The events of mitotic cell cycle which a...

The events of mitotic cell cycle which are under genetic control are
I. Cell growth
II. DNA replication
III. Distribution of chromosome to daughter nuclei
IV. Chromosome replication

A

I, II and IV only

B

II, III and IV only

C

II and III only

D

I, II, III and IV

Text Solution

AI Generated Solution

The correct Answer is:
To determine which events of the mitotic cell cycle are under genetic control, we will analyze each option provided in the question. ### Step-by-Step Solution: 1. **Identify the Events**: The events listed are: - I. Cell growth - II. DNA replication - III. Distribution of chromosomes to daughter nuclei - IV. Chromosome replication 2. **Analyze Each Event**: - **I. Cell growth**: This occurs primarily during the G1 phase of the cell cycle. During this phase, the cell grows and synthesizes organelles. This process is influenced by genetic factors, making it under genetic control. - **II. DNA replication**: This occurs during the S phase of the cell cycle. In this phase, the DNA is duplicated to ensure that each daughter cell receives an identical set of chromosomes. This process is also under genetic control. - **III. Distribution of chromosomes to daughter nuclei**: This occurs during the M phase, specifically in the telophase when the chromosomes are separated and distributed into the daughter cells. This process is regulated by genetic mechanisms, so it is also under genetic control. - **IV. Chromosome replication**: This is essentially the same as DNA replication and occurs during the S phase. It is also under genetic control. 3. **Conclusion**: All four events listed (I, II, III, and IV) are under genetic control. Therefore, the correct answer is that all the events are included. ### Final Answer: The events of the mitotic cell cycle which are under genetic control are: - I. Cell growth - II. DNA replication - III. Distribution of chromosomes to daughter nuclei - IV. Chromosome replication Thus, the correct option is **1st, 2nd, 3rd, and 4th**.
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