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Meiosis Stages Video Lecture - Biology Class 11 - NEET

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FAQs on Meiosis Stages Video Lecture - Biology Class 11 - NEET

1. What are the stages of meiosis?
Ans. Meiosis consists of two main stages: meiosis I and meiosis II. Meiosis I is further divided into prophase I, metaphase I, anaphase I, and telophase I. Meiosis II consists of prophase II, metaphase II, anaphase II, and telophase II.
2. What happens during prophase I of meiosis?
Ans. Prophase I is the longest phase of meiosis and is characterized by several key events. It includes the condensation of chromosomes, the formation of the spindle apparatus, and the pairing of homologous chromosomes in a process called synapsis. Additionally, genetic recombination occurs during prophase I through a process known as crossing over.
3. How does meiosis differ from mitosis?
Ans. Meiosis and mitosis are both cellular processes involved in the division of cells, but they have distinct differences. While mitosis results in two identical diploid daughter cells, meiosis leads to the formation of four non-identical haploid daughter cells. Meiosis also involves two rounds of cell division, resulting in genetic variation through crossing over and independent assortment.
4. What is the significance of meiosis in sexual reproduction?
Ans. Meiosis is crucial for sexual reproduction as it ensures genetic diversity and the formation of haploid gametes. During meiosis, genetic recombination occurs through crossing over, leading to the shuffling of genetic material between homologous chromosomes. This process contributes to the variability of offspring and evolution.
5. Can meiosis occur in non-sexual organisms?
Ans. Meiosis primarily occurs in sexually reproducing organisms, as it is responsible for the formation of gametes. However, some non-sexual organisms, such as certain fungi and algae, can undergo a modified form of meiosis known as "apomixis." Apomixis allows for the production of offspring without the need for fertilization, but it does not involve the exchange of genetic material between homologous chromosomes.
268 videos|544 docs|326 tests
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