Crossing Over in Meiosis
A Grade 9 science worksheet on crossing over, a key process in genetics that increases genetic variation during meiosis.
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Crossing Over in Meiosis
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Read each question carefully and answer to the best of your ability. This worksheet covers the process of crossing over during meiosis.
1. What is the primary purpose of crossing over during meiosis?
To reduce the chromosome number by half
To increase genetic variation in offspring
To ensure identical sister chromatids
To separate homologous chromosomes
2. During which phase of meiosis does crossing over occur?
Prophase I
Metaphase I
Anaphase II
Telophase II
3. Crossing over involves the exchange of genetic material between chromatids of chromosomes.
4. The point where crossing over occurs is called a .
5. Crossing over always happens at the exact same location on homologous chromosomes.
True
False
6. Briefly explain why genetic variation is important for a species.
7. Observe the diagram below, which illustrates a stage of meiosis where crossing over occurs. Label the homologous chromosomes and the chiasma.
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