Mutations (Grade 12 NSC Matric Life Sciences): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is a mutation?
What is a mutation?
A permanent change to DNA
What are the three main categories of mutations based on their impact?
What are the three main categories of mutations based on their impact?
Harmless, harmful, useful
What percentage of our genetic material is non-coding DNA?
What percentage of our genetic material is non-coding DNA?
98.5%
Which is an example of a harmless mutation?
Which is an example of a harmless mutation?
Freckles
Why are sex-linked mutations more common in males?
Why are sex-linked mutations more common in males?
Males have only one X chromosome
What shape do red blood cells become in sickle cell anaemia?
What shape do red blood cells become in sickle cell anaemia?
Sickle-shaped like a half-moon
What does albinism prevent the production of?
What does albinism prevent the production of?
Melanin
What is non-disjunction?
What is non-disjunction?
Chromosomes failing to separate properly
How many copies of chromosome 21 are present in Down syndrome?
How many copies of chromosome 21 are present in Down syndrome?
Three copies
What role do useful mutations play in evolution?
What role do useful mutations play in evolution?
They provide raw material for evolution