6.1.2 Meiosis

• Meiosis involves two successive cell divisions resulting in four genetically distinct daughter cells, each with half the original chromosome
• Mitosis involves two successive cell divisions.

  False
• Arrange the phases of meiosis I in the correct order.

  1️⃣ Prophase I

  2️⃣ Metaphase I

  3️⃣ Anaphase I

  4️⃣ Telophase I
• During Metaphase I, homologous chromosome pairs align along the metaphase plate
• Meiosis results in gametes with the same chromosome number as the parent cell.

  False
• Arrange the phases of meiosis II in the correct order.

  1️⃣ Prophase II

  2️⃣ Metaphase II

  3️⃣ Anaphase II

  4️⃣ Telophase II
• In Anaphase II, sister chromatids separate and move to opposite poles
• Crossing over and independent assortment are two mechanisms in meiosis that increase genetic variation.


  True
• Crossing over occurs during Prophase I of meiosis.
• During which phase of meiosis does crossing over occur?

  Prophase I
• Meiosis produces gametes with half the normal chromosome number
• What is the primary purpose of meiosis?

  Produce gametes
• What is the main difference between mitosis and meiosis in terms of chromosome number in daughter cells?

  Diploid vs haploid
• In meiosis, two successive cell divisions produce four genetically distinct daughter cells, each with a haploid
• What happens during crossing over in Prophase I?

  Exchange of DNA segments
• What occurs in Anaphase I of meiosis?

  Homologous pairs separate
• The key differences between mitosis and meiosis include the number of cell divisions and the genetic diversity of the daughter cells
• What happens to chromosomes during Prophase II?

  Condense further
• How many genetically distinct haploid cells are formed at the end of meiosis II?

  Four
• Match the mechanism with its key process and genetic outcome.

  Crossing Over ↔️ Exchange of DNA segments between homologous chromosomes

  Independent Assortment ↔️ Random alignment of homologous pairs
• When does independent assortment take place during meiosis?

  Metaphase I
• Independent assortment occurs during Metaphase I of meiosis.


  True
• What is the primary difference between mitosis and meiosis in terms of cell divisions?

  Mitosis: one, Meiosis: two
• Meiosis results in four genetically identical daughter cells.

  False
• In Anaphase I, homologous pairs separate and move to opposite poles.
• Arrange the phases of meiosis II in the correct order:

  1️⃣ Prophase II

  2️⃣ Metaphase II

  3️⃣ Anaphase II

  4️⃣ Telophase II
• How many genetically distinct haploid cells are formed at the end of meiosis II?

  Four
• What is the diploid chromosome number restored after fertilization?

  Zygote
• In meiosis, daughter cells have a haploid chromosome number.
• What is the key event during Prophase I of meiosis?

  Crossing over
• Match each phase of meiosis II with its key event:

  Prophase II ↔️ Chromosomes condense further

  Metaphase II ↔️ Chromosomes align at metaphase plate

  Anaphase II ↔️ Sister chromatids separate

  Telophase II ↔️ Four haploid cells form
• During Anaphase II, sister chromatids separate and move to opposite poles.
• Crossing over and independent assortment are the primary mechanisms that generate genetic variation during meiosis.


  True
• Genetic diversity in meiosis is generated through crossing over and independent assortment.