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    BMAT 2020 S2

    BMAT 2020 S2

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    This section is Section 2 of 3.

    Speed as well as accuracy is important in this section. Work quickly, or you might not finish the paper. There are no penalties for incorrect responses, only marks for correct answers, so you should attempt all 27 questions. Each question is worth one mark.

    You must complete the answers within the time limit. Calculators are NOT permitted.

    Good Luck!

    1- Asexual reproduction always produces genetic variation.

    2- Gamete production is the only possible source of genetic variation in sexual reproduction.

    3- The environment can cause genetic variation.

    4- Mutations can produce genetic variation.

    1. Which two of the following statements about genetic variation are correct?
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    Explanation

    The correct answer is F.

    Asexual production produces offspring which are genetically identical to the parents and hence each other, so statement 1 is incorrect.

    Statement 2 is also false because mutations can also be a cause of genetic variation.

    The environment can affect genetic variation by altering gene expression (epigenetic variation), so statement 3 is correct.

    As per the explanation for statement 2, statement 4 must hence be true.

    Therefore only statements 3 and 4 are correct.

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