2633008
Question 1
Question
What name is given to the process by which a spindle fibre fails during meiosis and one or more of the gametes produced receives an extra chromosome?
Answer
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non-disjunction
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meiosis
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polyploidy
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mutation
Question 2
Question
How many gametes (out of 4) will receive an extra chromosome if the spindle failure occurs during the first meiotic division?
Answer
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2
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4
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1
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0
Question 3
Question
If a normal human sperm fertilizes an egg containing an extra copy of chromosome 21, what is the diploid number of the zygote formed?
Answer
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44
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46
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47
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43
Question 4
Question
What is meant by the term polyploidy?
Answer
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an increase in the number of chromosomes by 3 or more times
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a decrease in the number of chromosomes by 3 or more times
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an addition in the number of chromosomes in gametes
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a subtraction in the number of chromosomes in gametes
Question 5
Question
How are polyploidy plants economically important to farmers?
Answer
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they are resistant to disease
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they are smaller so farmers will have a bigger yield
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they make the coffee taste better
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they give bigger yields
Question 6
Question
What name is given to a change which involves a chromosome breaking in two places and a segment of genes dropping out?
Answer
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Deletion
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Duplication
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Inversion
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Translocation
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