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7/21/2019 4.2 - Meiosis Revision Questions
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IB BiologyTopic 4: Genetics
Revision Questions
4.2 Meiosis Revision
Questions
1. If the amount of DNA in a haploid gamete is represented by , what is the net
quantity of DNA in a cell from the same organism at the start of meiosis?
A. 0.
!.
". #
D. $ (Total 1 mark)
#. %hat happens in crossing o&er?
A. '(change of genetic material between homologous chromosomes
!. '(change of genes during metaphase of mitosis
". )andom distribution of chromosomes during meiosis
D. *omologous chromosomes fail to separate during meiosis(Total 1 mark)
+. he diagram below shows the cell of an organism going through the first di&ision of
meiosis.
*ow many different combinations are possible for these chromosomes in the
haploid cells formed by meiosis?
A. #!. -
".
D. /(Total 1 mark)
$. %hich of the following statements about homologous chromosomes is correct?
A. 'ach gene is at the same locus on both chromosomes.
!. hey are two identical copies of a parent chromosome which are attached
to one another at the centromere.
". hey always produce identical phenotypes.
7/21/2019 4.2 - Meiosis Revision Questions
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IB BiologyTopic 4: Genetics
Revision QuestionsD. hey are chromosomes that ha&e identical genes and alleles.
(Total 1 mark)
. %hich of the following types of information are needed to construct a aryotype?
I. i2e of the chromosomes
II. 3ene mutations of the chromosomes
III. Age of the indi&idual
A. I only
!. II only
". I and II only
D. I, II and III(Total 1 mark)
-. In the following diagram, which pair represents homologous chromosomes?
A. 1 and #
!. + and $
". # and
D. $ and -(Total 1 mark)
4. %hich of the following will promote &ariation in a species?
I. 5eiosis
II. 6ertili2ation
III. Natural selection
A. I only
!. II only
". I and II only
D. I, II and III(Total 1 mark)
7/21/2019 4.2 - Meiosis Revision Questions
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IB BiologyTopic 4: Genetics
Revision Questions
. %hat does the aryotype below correspond to?
A. A normal male
!. A normal female
". A female with Down syndrome
D. A male with Down syndrome(Total 1 mark)
/. %hich phase of cell di&ision is photographed in order to mae a aryotype?
A. Anaphase of mitosis
!. Anaphase I of meiosis
". 5etaphase of mitosis
D. 5etaphase II of meiosis
(Total 1 mark)
10. If the haploid number of a species is 1$, how many chromatids will there be in
metaphase I in a di&iding diploid cell?
A. 4
!. 1$
". #
D. -(Total 1 mark)
11. he aryotype below shows the chromosomes from a person with Down
7/21/2019 4.2 - Meiosis Revision Questions
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IB BiologyTopic 4: Genetics
Revision Questionssyndrome.
7ource8 9.. Department of 'nergy *uman 3enome :rogram ;genomics.energy.go&,
genomicscience.energy.go&utline how Down syndrome occurs due to meiosis.
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.......................................................................................................................(2)
;c< Determine, gi&ing a reason, the se( of the person in the aryotype.
.......................................................................................................................
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1#. '(plain how se(ual reproduction can e&entually lead to e&olution in offspring.(8)
7/21/2019 4.2 - Meiosis Revision Questions
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IB BiologyTopic 4: Genetics
Revision Questions
1+. Describe aryotyping and one application of its use.(4)
7/21/2019 4.2 - Meiosis Revision Questions
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IB BiologyTopic 4: Genetics
Revision Questions