Lesson 3.3.2
3.3.2 Meiosis and genetic variation Quiz: Pearson Edexcel Biology, Unit 3
20 questions
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Lesson 3.3.2, Meiosis and genetic variation: 20 multiple choice questions for the Pearson Edexcel Biology (9BI0), Unit 3: Voice of the Genome, written with Revision Ninja.
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The 20 questions
-
What is the primary product of a single cell undergoing meiosis?
- Four diploid cells
- Two diploid cells
- Four haploid cells
- Two haploid cells
-
During which stage of meiosis does independent assortment of homologous chromosomes occur?
- Metaphase I
- Telophase II
- Prophase I
- Anaphase II
-
During which stage of meiosis does crossing over take place?
- Interphase
- Anaphase I
- Metaphase I
- Prophase I
-
For 23 pairs of chromosomes, how many different combinations of maternal and paternal chromosomes can a gamete receive by independent assortment alone?
- 2^23, about 8.4 million
- 2 x 23 = 46 only
- 23 factorial
- 23 x 2 = 46
-
A diploid organism has 4 pairs of chromosomes. How many different chromosome combinations can its gametes receive by independent assortment alone?
- 4
- 256
- 8
- 16
-
A cell with 2n = 6 completes meiosis. How many chromosomes are present in each daughter cell?
- 2
- 12
- 6
- 3
-
Which pair of meiotic processes generates genetic variation in gametes?
- Transcription and translation
- Replication and condensation
- Crossing over and assortment
- Mitosis and cytokinesis
-
What cells are produced at the end of meiosis I?
- Four diploid cells
- Two haploid cells
- Four haploid cells
- Two diploid cells
-
What term describes matching chromosome pairs carrying the same genes at identical loci?
- Homologous chromosomes
- Heterozygous chromosomes
- Sister chromatids
- Bivalent pairs
-
What is the failure of homologous chromosomes to separate during meiosis called?
- Crossing over
- Independent assortment
- Translocation
- Non-disjunction
-
Two genes are 40 map units apart on the same chromosome. What proportion of gametes is expected to be recombinant?
- 80%
- 4%
- 40%
- 20%
-
What process in meiosis creates new combinations of alleles on single chromosomes?
- Crossing over
- Random fertilisation
- Independent assortment
- Cytokinesis
-
How does random fertilisation increase genetic variation in offspring?
- Produces new alleles
- Combines random gametes
- Replicates maternal DNA
- Doubles chromosome count
-
A cell with 2n = 8 has just replicated its DNA. How many chromatids are present at the start of meiosis I?
- 8
- 4
- 16
- 32
-
Meiosis is an example of which type of cell division?
- Binary fission
- Reduction division
- Vegetative propagation
- Budding
-
Which is the correct sequence of phases in meiosis I?
- Prophase, metaphase, anaphase
- Metaphase, prophase, anaphase
- Anaphase, metaphase, prophase
- Prophase, anaphase, metaphase
-
How many functional gametes are produced from one male cell undergoing meiosis?
- One
- Four
- Two
- Eight
-
An individual is heterozygous for three genes on different chromosomes. How many genetically distinct gametes can be formed by independent assortment alone?
- 27
- 6
- 8
- 3
-
What term describes chromatids containing new allele combinations following crossing over?
- Homologous chromatids
- Sister chromatids
- Bivalent chromatids
- Recombinant chromatids
-
Which process restores the diploid chromosome number?
- Mitosis
- Binary fission
- Fertilisation
- Crossing over
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