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Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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In Meiosis, what is crossing over, how does it happen, and what is the significance of it?
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- What is independent assortment? Does independent assortment occur during mitosis or during meiosis?arrow_forwardWhat is physically exchanged during crossing over?arrow_forwardCompare meiotic anaphase I with meiotic anaphase II. Which meiotic anaphase is most similar to the mitotic anaphase?arrow_forward
- Assume that a meiotic-nondisjunction event causes trisomy 8 in a newborn. If two of the three copies of chromosome 8 are absolutely identical, at what point during meiosis did the nondisjunction event take place?arrow_forwardCan haploid cells divide by mitosis? by meiosis?arrow_forwardWhat chromosomal abnormality can result from dispermy?arrow_forward
- Human sex chromosomes are XX for females and XY for males. a. With respect to an X-linked gene, how many different types of gametes can a male produce? b. If a female is homozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele? c. If a female is heterozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele?arrow_forwardExplain how the random alignment of homologous chromosomes during metaphase I contributes to variation in gametes produced by meiosis.arrow_forward10.2 What are the stages of mitosis, and what happens in each stage?arrow_forward
- Which of the following statements is not true in comparing mitosis and meiosis? a. Twice the number of cells are produced in meiosis as in mitosis. b. Meiosis is involved in the production of gametes, unlike mitosis. c. Crossing over occurs in meiosis I but not in meiosis II or mitosis. d. Meiosis and mitosis both produce cells that are genetically identical. e. In both mitosis and meiosis, the parental cell is diploid.arrow_forwardIn what ways is meiosis II similar to and different from mitosis of a diploid cell?arrow_forwardNondisjunction can be caused by ________. a. crossing over in meiosis b. segregation in meiosis c. failure of chromosomes to separate during meiosis d. multiple independent assortmentsarrow_forward
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