Chromosome crossing over occurs during Meiosis 1 (D). Here's a step-by-step explanation:

1. Meiosis is a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell. It is a process that allows sexual reproduction, with two main phases: Meiosis 1 and Meiosis 2.

2. During Meiosis 1, homologous chromosomes pair up in a process called synapsis. Each pair consists of one chromosome from the mother and one from the father.

3. The paired chromosomes then exchange segments in a process called crossing over or recombination. This happens in the Prophase 1 stage of Meiosis 1.

4. The point where the chromosomes crossover are called chiasmata. This process contributes to genetic diversity in offspring.

5. The chromosomes then line up along the metaphase plate during Metaphase 1, separate during Anaphase 1, and the cells divide during Telophase 1.

6. Meiosis 2 then follows, which is similar to mitosis, where sister chromatids separate.

So, the correct answer to your question is D. Meiosis 1.

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Chromosome crossing over occurs during Meiosis 1 (D). Here's a step-by-step explanation:

1. Meiosis is a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell. It is a process that allows sexual reproduction, with two main phases: Meiosis 1 and Meiosis 2.

2. During Meiosis 1, homologous chromosomes pair up in a process called synapsis. Each pair consists of one chromosome from the mother and one from the father.

3. The paired chromosomes then exchange segments in a process called crossing over or recombination. This happens in the Prophase 1 stage of Meiosis 1.

4. The point where the chromosomes crossover are called chiasmata. This process contributes to genetic diversity in offspring.

5. The chromosomes then line up along the metaphase plate during Metaphase 1, separate during Anaphase 1, and the cells divide during Telophase 1.

6. Meiosis 2 then follows, which is similar to mitosis, where sister chromatids separate.

So, the correct answer to your question is D. Meiosis 1.

Knowee AI · Accepted Answer

Chromosome crossing over occurs during Meiosis 1 (D). Here's a step-by-step explanation:

1. Meiosis is a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell. It is a process that allows sexual reproduction, with two main phases: Meiosis 1 and Meiosis 2.

2. During Meiosis 1, homologous chromosomes pair up in a process called synapsis. Each pair consists of one chromosome from the mother and one from the father.

3. The paired chromosomes then exchange segments in a process called crossing over or recombination. This happens in the Prophase 1 stage of Meiosis 1.

4. The point where the chromosomes crossover are called chiasmata. This process contributes to genetic diversity in offspring.

5. The chromosomes then line up along the metaphase plate during Metaphase 1, separate during Anaphase 1, and the cells divide during Telophase 1.

6. Meiosis 2 then follows, which is similar to mitosis, where sister chromatids separate.

So, the correct answer to your question is D. Meiosis 1.

When does chromosome crossing over occur?A. Growth PhaseB. Synthesis PhaseC. MitosisD. Meiosis 1E. Meiosis 2

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