Exploring Meiosis in IB Biology

This video tutorial explores the processes of meiosis and mitosis, starting with a review of mitosis and its stages: prophase, metaphase, anaphase, and telophase. It highlights the differences between mitosis and meiosis, focusing on the unique aspects of meiosis such as crossing over and genetic variation. The tutorial uses animations to illustrate these processes and emphasizes the importance of understanding the phases and vocabulary associated with each process.

What is the primary focus of the video?

• The process of meiosis

• The structure of chromosomes

• The process of mitosis

• The comparison between mitosis and meiosis

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Which phase is not considered part of mitosis?

• Anaphase

• Interphase

• Metaphase

• Prophase

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NGSS.HS-LS1-4

During which phase do chromosomes become visible in mitosis?

• Telophase

• Metaphase

• Prophase

• Interphase

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NGSS.HS-LS1-4

What happens during anaphase in mitosis?

• Chromosomes line up in the middle

• Chromosomes become visible

• Nuclear membrane disappears

• Sister chromatids split

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In which type of cells does meiosis occur?

• Nerve cells

• Muscle cells

• Gametes

• All body cells

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What is the key event in prophase 1 of meiosis?

• Chromosomes line up in the middle

• Homologous chromosomes pair up and exchange bits

• Sister chromatids split

• Nuclear membrane reappears

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What is the term for the process where homologous chromosomes exchange genetic material?

• Crossing over

• Synapses

• Bivalent formation

• Metaphase

What is a bivalent?

• A single chromosome

• A pair of homologous chromosomes

• A sister chromatid

• A spindle fiber

What is the result of meiosis in terms of genetic variation?

• Cells with double the number of chromosomes

• Identical cells

• Genetically unique cells

• Cells with half the number of chromosomes

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NGSS.HS-LS3-2

What happens during metaphase 1 in meiosis?

• Chromosomes line up randomly

• Homologous pairs line up at the equator

• Sister chromatids split

• Nuclear membrane reappears