Abnormal meiosis Grade 12 Life Sciences Notes with Activities Questions and Answers

This page holds 3 Abnormal meiosis Grade 12 files for download, free and in PDF. That is 2 question papers and 1 supporting document. They run from 2020 through to 2021.

• 3 files
• 2020–2021

All Life Sciences Grade 12 papers and notes →

Notes

Sometimes mistakes occur during the process of meiosis.

• This can happen in Anaphase 1 where the homologous chromosomes may not separate. Also called non-disjunction.
• It can also happen in Anaphase 2 when there is non-disjunction of the sister chromatids.
• If there is non-disjunction of chromosome pair 21 in humans it leads to the formation of an abnormal gamete with an extra copy of chromosome 21.
• If there is fusion between a normal gamete and an abnormal gamete (with extra copy of chromosome 21) it leads to Down Syndrome.

Video Lesson on Abnormal meiosis

PDF Downloadable Notes on Abnormal meiosis:

Question and Answers Activities:

Find short and long questions for Grade 12 Life Sciences, which will help you to prepare for the exams, tests, practical tasks, and assignments.

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.