The significance of meiosis Grade 12 Life Sciences Notes with Activities Questions and Answers

On this page you will find The significance of meiosis Grade 12 Life Sciences Notes under Meiosis, which includes revision activities with questions and answers to help grade 12 learners to prepare for their tests and exams.

Notes

There are two reasons why meiosis is important.

1. It reduces the number of chromosomes by half, in other words from diploid to haploid. This ensures that sex cells have half the number of chromosomes of other somatic cells so that when fertilisation occurs the zygote formed has the correct number of chromosomes. It balances the doubling effect of fertilisation.
2. Crossing over introduces genetic variation. Genetic variation results in offspring that are better adapted to a particular environment and ensures that they will have a better chance of survival.

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More Resources

• https://www.elimuza.com/grade-12/item/1037-meiosis-life-sciences-study-guides-and-notes-grade-12
• https://www.studocu.com/en-za/document/further-education-and-training/life-sciences/grade-12-life-science-meiosis-fet-phase/17623978
• https://www.yourgenome.org/facts/what-is-meiosis
• https://learn.mindset.africa/resources/life-sciences/grade-12/meiosis

Meiosis Notes: What is meiosis, The process of meiosis in animal cells, The significance of meiosis, Abnormal meiosis, and Differences between meiosis I and meiosis II.