Grade 12 Life Sciences | Gene Mutations Explained 🧬

🧬 Grade 12 Life Sciences – Mutations
This video explains mutations, a key concept in genetics for Matric exams (CAPS/NSC).
Understanding mutations helps you answer questions on DNA changes, genetic variation, and inherited disorders.

🧠 What you’ll learn:
• What a mutation is
• Causes of mutations
• Types of mutations
• Effects of mutations on organisms

🔑 What is a Mutation?
• A change in the DNA sequence
• Can occur in a gene or chromosome
• Can be harmful, beneficial, or neutral

🔁 Types of Mutations:
🔴 Gene Mutations
• Change in the base sequence of DNA
• Example: substitution, insertion, deletion

🔵 Chromosomal Mutations
• Change in chromosome structure or number
• Example: duplication, deletion, inversion
• Includes aneuploidy

⚡ Causes of Mutations:
• Errors during DNA replication
• Radiation (e.g. UV, X-rays)
• Chemicals (mutagens)

⚠️ Exam Tips:
• Define mutation as a change in DNA sequence
• Distinguish gene vs chromosomal mutations
• Link mutations to genetic variation
• Mention possible effects (harmful/beneficial/neutral)

🎯 Why this matters:
Mutations are important for:
• Evolution and variation
• Genetic disorders
• Understanding DNA and inheritance

📺 Watch more Life Sciences revision videos here:
https://www.youtube.com/playlist?list=PLdW8yBAYFaIhoHpt5OZ8uPKhrYuJkpTY4

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📌 Tags:
mutations dna changes, gene vs chromosomal mutations, aneuploidy genetics, mutagens radiation chemicals, grade 12 life sciences caps nsc, genetics revision biology

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#LifeSciences #Matric2027 #Mutations #Genetics #DNA #BiologyRevision #NSC #CAPS

Видео Grade 12 Life Sciences | Gene Mutations Explained 🧬 канала Life Science and Geography (CAPS)