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Select correct statement for haplontic l...

Select correct statement for haplontic life cycle `:`

A

mitosis in the zygote results in the formation of haploid spores

B

meiosis in the zygote results in the formation of the haploid spores

C

meiosis in the zygote results in the formation of diploid spores

D

mitosis in the zygote results in the formation of haploid gametes

Text Solution

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The correct Answer is:
To solve the question regarding the correct statement for the haplontic life cycle, we will follow these steps: ### Step-by-Step Solution: 1. **Understand the Haplontic Life Cycle**: - In a haplontic life cycle, the dominant phase is the gametophyte, which is haploid (n). This means that the main plant body is made up of cells that contain a single set of chromosomes. 2. **Gametogenesis**: - The haploid gametophyte produces male and female gametes through a process called gametogenesis. This process occurs via mitosis, which means that the gametes formed are also haploid (n). 3. **Fertilization**: - When the male and female gametes fuse during fertilization, they form a zygote. This zygote is diploid (2n) and is the only diploid stage in the haplontic life cycle. 4. **Zygotic Meiosis**: - The zygote undergoes a process called zygotic meiosis. This is where the diploid zygote divides meiotically to produce four haploid spores (n). 5. **Development of Spores**: - The haploid spores that result from zygotic meiosis will then undergo mitotic divisions to develop into new gametophytes, thus completing the life cycle. 6. **Evaluate the Options**: - Now, we will evaluate the provided options: - **Option A**: Mitosis in the zygote results in the formation of haploid spores. (Incorrect) - **Option B**: Meiosis in the zygote results in the formation of haploid spores. (Correct) - **Option C**: Meiosis in the zygote results in the formation of diploid spores. (Incorrect) - **Option D**: Mitosis in the zygote results in the formation of haploid gametes. (Incorrect) 7. **Conclusion**: - The correct statement regarding the haplontic life cycle is **Option B**: "Meiosis in the zygote results in the formation of haploid spores."
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