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AP Biology Meiosis and Sexual Reproduction — practice questions

Explore 25 free Meiosis and Sexual Reproduction questions in AP Biology Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Meiosis and Sexual Reproduction questions and exercises with answers

Showing questions 1–25 of 25.

Meiosis differs from mitosis in that it involves how many rounds of nuclear division?Read the answer and worked solution →One diploid cell entering meiosis produces how many daughter cells?Read the answer and worked solution →In meiosis, DNA replicates how many times?Read the answer and worked solution →Meiosis I separates homologous chromosomes; meiosis II separates:Read the answer and worked solution →The tight pairing of homologous chromosomes during prophase I is called:Read the answer and worked solution →Cells of a multicellular organism other than the reproductive cells are called:Read the answer and worked solution →A single crossover event exchanges equivalent DNA between:Read the answer and worked solution →Crossover events are described as which source of genetic variation in meiosis?Read the answer and worked solution →The random orientation of tetrads at the metaphase plate is known as:Read the answer and worked solution →With n chromosomes per set, the number of possible metaphase alignments equals:Read the answer and worked solution →Because humans have 23 chromosome pairs, independent assortment alone gives roughly:Read the answer and worked solution →A spindle fibre that has attached to a kinetochore is called a:Read the answer and worked solution →Interkinesis, the interval between meiosis I and meiosis II, is unusual because it lacks:Read the answer and worked solution →At the end of meiosis I the two cells are already haploid because each pole holds:Read the answer and worked solution →Meiosis II is not called a reduction division because the resulting cells still hold:Read the answer and worked solution →Sister chromatids emerging from meiosis I are not perfectly identical because:Read the answer and worked solution →The Red Queen hypothesis, offered to explain why sexual reproduction persists, was first proposed in 1973 by:Read the answer and worked solution →Comparing life cycles, the dominant stage is diploid in most animals but in fungi it is:Read the answer and worked solution →Sister chromatids are held together at the centromere by which proteins?Read the answer and worked solution →Mitosis or meiosis?Read the answer and worked solution →Follow a cell through meiosisRead the answer and worked solution →Match each meiosis term to its meaningRead the answer and worked solution →Count the meiosis numbersRead the answer and worked solution →True or false: meiosisRead the answer and worked solution →Complete the variation ruleRead the answer and worked solution →

Worked practice questions

Meiosis differs from mitosis in that it involves how many rounds of nuclear division?

  1. Two rounds
  2. Three rounds
  3. Four rounds
  4. One round
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Correct answer: A. Two rounds

1. Mitosis has just one nuclear division and produces two identical nuclei. 2. Meiosis has to halve the chromosome number, which takes more than one split. 3. Unlike mitosis, in which there is just one nuclear division, meiosis has two complete rounds of nuclear division, meiosis I and meiosis II. 4. Three and four rounds would reduce the chromosome number too far. _Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 11 'Meiosis and Sexual Reproduction', sections 11.1-11.2_

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One diploid cell entering meiosis produces how many daughter cells?

  1. Three cells
  2. Four cells
  3. Eight cells
  4. Two cells
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Correct answer: B. Four cells

1. Two rounds of division act on one starting cell. 2. Each round doubles the number of nuclei. 3. These result in four nuclei and usually four daughter cells, each with half the number of chromosomes as the parent cell. 4. Two cells would be the result of mitosis instead. _Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 11 'Meiosis and Sexual Reproduction', sections 11.1-11.2_

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In meiosis, DNA replicates how many times?

  1. Three times
  2. Four times
  3. Once only
  4. Twice over
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Correct answer: C. Once only

1. Replication happens in the S phase of interphase, before meiosis begins. 2. There is no second S phase between the two meiotic divisions. 3. During meiosis, DNA replicates once but divides twice, whereas in mitosis DNA replicates once but divides only once. 4. That single replication against two divisions is what halves the chromosome number. _Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 11 'Meiosis and Sexual Reproduction', sections 11.1-11.2_

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