SCIENCE 7: Quarter 2- LC 5.1: CELL DIVISION || MATATAG CURRICULUM

Summary

This lesson introduces 7th-grade students to cell division, focusing on mitosis and meiosis. The objectives are to define both processes, demonstrate them with models or manipulatives, and understand their importance in growth, repair, and reproduction. The lesson compares mitosis (producing two identical daughter cells) and meiosis (producing four genetically distinct daughter cells with half the chromosome number). Students engage in activities like modeling cell division and filling out a KWL chart to reflect on their learning. The teacher emphasizes interactive methods and uses visual aids to support student engagement and comprehension.

Takeaways

• 😀 Cell division is the process by which a parent cell divides to form two or more daughter cells.
• 😀 Mitosis and meiosis are the two main types of cell division, each with distinct purposes and outcomes.
• 😀 Mitosis produces two genetically identical daughter cells and is responsible for growth, repair, and asexual reproduction.
• 😀 Meiosis produces four genetically distinct daughter cells, each with half the number of chromosomes as the parent cell, and is essential for sexual reproduction.
• 😀 The importance of cell division includes growth, repair, regeneration, and reproduction in living organisms.
• 😀 Mitosis is responsible for growth and repair in multicellular organisms, whereas meiosis generates gametes like sperm and egg cells.
• 😀 Mitosis maintains the diploid chromosome number in daughter cells, while meiosis reduces the chromosome number by half, creating haploid cells.
• 😀 The teacher uses a picture and process questions to activate students' prior knowledge on cell division.
• 😀 A vocabulary activity, like a matching game, is used to help students understand key terms related to cell division.
• 😀 A hands-on activity, such as modeling cell division with manipulatives or physical models, allows students to visualize the process.
• 😀 At the end of the lesson, students complete a KWL chart and answer guided questions to reflect on their learning about mitosis and meiosis.

Q & A

What is cell division?

Cell division is the process by which a parent cell divides to form two or more daughter cells. It is essential for growth, repair, regeneration, and reproduction in living organisms.

What are the two main types of cell division?

The two main types of cell division are mitosis and meiosis.

What is mitosis, and what does it produce?

Mitosis is the process of cell division that results in two genetically identical daughter cells. It is responsible for growth, repair, and asexual reproduction in multicellular organisms.

What is meiosis, and what does it produce?

Meiosis is the process of cell division that produces four genetically distinct daughter cells, each with half the number of chromosomes as the parent cell. It occurs during sexual reproduction, producing gametes such as sperm and egg cells.

How does mitosis differ from meiosis in terms of daughter cells?

Mitosis produces two genetically identical daughter cells, while meiosis produces four genetically distinct daughter cells.

How do the chromosome numbers in daughter cells differ between mitosis and meiosis?

In mitosis, the daughter cells have the same diploid chromosome number as the parent cell, whereas in meiosis, the daughter cells have a haploid chromosome number, which is half of the parent cell's chromosome number.

Why is mitosis important for multicellular organisms?

Mitosis is crucial for multicellular organisms as it supports growth, repair of damaged tissues, and asexual reproduction.

What role does meiosis play in sexual reproduction?

Meiosis plays a key role in sexual reproduction by producing gametes (sperm and egg cells), each with half the chromosome number, ensuring genetic diversity in offspring.

What is the purpose of using manipulatives or physical models in this lesson on cell division?

The use of manipulatives or physical models helps students visualize and understand the process of cell division, making abstract concepts like chromosome duplication and separation more tangible and easier to comprehend.

How does the KWL chart help students during this lesson?

The KWL chart encourages active engagement by helping students organize what they already know (K), what they want to learn (W), and what they have learned (L) during the lesson. It serves as a reflection tool to reinforce the key concepts of cell division.