Meiosis
Overview
If gametes had the full set of chromosomes, every fertilisation would double the number, and life would quickly become impossible. Meiosis solves this: it is the special cell division that halves the chromosome number to make gametes, and along the way it shuffles the genetic deck so that no two gametes are quite the same.
In this short Extended lesson you will state that meiosis makes gametes and define it as a reduction division that halves the chromosome number from diploid to haploid, producing genetically different cells.
Objectives
- [Supplement] State that meiosis is involved in the production of gametes
- [Supplement] Describe meiosis as a reduction division in which the chromosome number is halved from diploid to haploid resulting in genetically different cells (details of the stages of meiosis are not required)
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Lesson Evaluation
Congratulations on completing the lesson on Meiosis. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- Meiosis is involved in the production of: A. body cells B. gametes C. identical clones D. stem cells Answer: B
- In meiosis the chromosome number is: A. doubled B. maintained C. halved from diploid to haploid D. unchanged Answer: C
- The cells produced by meiosis are: A. genetically identical B. genetically different C. always diploid D. body cells Answer: B
- A human cell with 46 chromosomes undergoes meiosis. Each gamete has: A. 46 chromosomes B. 92 chromosomes C. 23 chromosomes D. 12 chromosomes Answer: C
- Which process restores the diploid number after meiosis? A. mitosis B. fertilisation C. replication D. germination Answer: B
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