Questions and Answers
Each daughter cell produced in meiosis has?
half the number of chromosomes as the parent cell.
The number of cells produced in meiosis is?
twice the number of cells produced in mitosis.
Which of the following is unique to meiosis?
DNA replication occurs prior to both mitosis and meiosis.
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A crossover in meiosis is an exchange of genetic material between?
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Crossing over is the exchange of ______ between homologous chromosomes.
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Crossing over can occur during what phase of meiosis?
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If crossing over occurs between a homologous pair of chromosomes during meiosis, what will be present in the gametes?
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What is the order of events during meiosis 1?
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Individuals have _____ chromosomes in haploid cells.
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When two haploid gametes combine, a zygote with _____ chromosomes forms.
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Suppose an error in meiosis produced diploid gametes. After fertilization, each offspring would have _____ chromosomes in its diploid cells.
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Study Notes
Meiosis Overview
- Each daughter cell produced in meiosis contains half the number of chromosomes compared to the parent cell.
- Meiosis produces twice as many cells as mitosis does.
Unique Features of Meiosis
- Crossing over, which is the exchange of genetic material, specifically occurs between nonsister chromatids of homologous chromosomes.
DNA Replication
- DNA replication occurs prior to both mitosis and meiosis, ensuring that genetic material is duplicated before cell division.
Meiosis Phases
- Crossing over occurs during prophase I of meiosis, facilitating genetic diversity.
Genetic Outcomes
- After crossing over, gametes can contain either parental combinations of alleles or recombinant chromatids, contributing to variation in offspring.
Order of Events in Meiosis I
- Key stages include:
- Synapsis: pairing of homologous chromosomes
- Crossing over: exchange of genetic material between chromosomes
- Random orientation: alignment during metaphase
- Separation of homologous chromosomes: anaphase outcome
Chromosome Counts
- In haploid cells, individuals possess 12 chromosomes.
- When two haploid gametes unite, they form a zygote with 24 chromosomes.
- Errors during meiosis that lead to diploid gametes would result in offspring having 48 chromosomes in their diploid cells.
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Description
Test your knowledge on meiosis with these flashcards covering key concepts and mechanisms. This quiz includes definitions on chromosome numbers, cell production, and unique features of meiosis. Perfect for revising chapter 9 of your biology curriculum.
