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Unit 5: Heredity
5.2 Meiosis and Genetic Diversity
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What is meiosis defined as?
Specialized cell division
In meiosis I, the parent cell divides into two daughter cells, each with the same number but different combinations of
chromosomes
Order the processes that contribute to genetic diversity in meiosis
1️⃣ Independent assortment
2️⃣ Crossing over
Meiosis results in haploid cells, while mitosis produces diploid
cells
Meiosis produces cells with half the normal number of
chromosomes
.
True
What type of cells are produced in meiosis II?
Haploid cells
Match the characteristics of meiosis and mitosis
Meiosis ↔️ Two cell divisions
Mitosis ↔️ One cell division
What is the purpose of meiosis in organisms?
Sexual reproduction
Order the phases of meiosis I
1️⃣ Prophase I
2️⃣ Metaphase I
3️⃣ Anaphase I
4️⃣ Telophase I
What happens during metaphase I of meiosis I?
Homologous chromosomes align
Meiosis results in genetic diversity through crossing over and independent
assortment
Match the phases of meiosis I with their key events
Prophase I ↔️ Crossing over occurs
Metaphase I ↔️ Homologous chromosomes align
Anaphase I ↔️ Homologous chromosomes separate
Telophase I ↔️ Nuclear envelopes reform
In anaphase I, the reduction in chromosome number results in daughter cells with half the normal number of
chromosomes
During Anaphase I, the chromosome number is reduced from diploid to
haploid
What are the two processes that contribute to genetic diversity in meiosis?
Crossing over and independent assortment
Mitosis produces two identical
diploid
cells
True
Order the phases of Meiosis I
1️⃣ Prophase I
2️⃣ Metaphase I
3️⃣ Anaphase I
4️⃣ Telophase I
In Telophase II, cytokinesis results in four
haploid
cells
In Metaphase II, sister chromatids align at the
metaphase plate
True
During Anaphase II, sister chromatids separate and move to opposite
poles
In which phase of meiosis does independent assortment occur?
Metaphase I
Independent assortment ensures each gamete receives an identical combination of chromosomes
False
Meiosis involves two cell divisions: Meiosis I and Meiosis
II
Match the characteristic with the correct type of cell division:
Number of Cell Divisions ↔️ Meiosis: Two, Mitosis: One
Chromosome Number ↔️ Meiosis: Haploid, Mitosis: Diploid
Purpose ↔️ Meiosis: Sexual Reproduction, Mitosis: Growth
Genetic Variation ↔️ Meiosis: High, Mitosis: None
During Prophase I, homologous chromosomes pair up in a process called
synapsis
Which phase of meiosis II involves the separation of sister chromatids?
Anaphase II
Order the stages of meiosis II:
1️⃣ Prophase II
2️⃣ Metaphase II
3️⃣ Anaphase II
4️⃣ Telophase II
Anaphase I reduces the chromosome number from diploid to
haploid
During which phase of meiosis does crossing over occur?
Prophase I
Independent assortment occurs during Metaphase I of meiosis.
True
Mitosis is essential for the growth and repair of
multicellular
organisms.
True
During prophase I, homologous chromosomes pair up in a process called
synapsis
What reforms during telophase I of meiosis I?
Nuclear envelopes
Meiosis involves two successive cell divisions, while mitosis involves only one.
True
Order the phases of meiosis II
1️⃣ Prophase II
2️⃣ Metaphase II
3️⃣ Anaphase II
4️⃣ Telophase II
Meiosis II results in four haploid cells with identical genetic information.
False
Order the key events in Anaphase I of meiosis
1️⃣ Separation of homologous chromosomes
2️⃣ Movement to opposite poles
3️⃣ Reduction in chromosome number
Meiosis results in four
haploid
gametes
During Prophase I, crossing over occurs between non-sister
chromatids
In Metaphase I, homologous chromosome pairs align at the metaphase plate
True
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