Human Heredity: Principles and Issues (MindTap Course List)
Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Chapter 3, Problem 24QP

Meiosis Explains Mendel’s Results: Genes Are on Chromosomes

The following diagram shows a hypothetical diploid cell. The recessive allele for albinism is represented by a, and d represents the recessive allele for deafness. The normal alleles for these conditions are represented by A and D, respectively.

  1. a. According to the principle of segregation, what is segregating in this cell?
  2. b. According to Mendel’s principle of independent assortment, what is independently assorting in this cell?
  3. c. How many chromatids are in this cell?
  4. d. Write the genotype of the individual from whom this cell was taken.

Chapter 3, Problem 24QP, Meiosis Explains Mendels Results: Genes Are on Chromosomes The following diagram shows a

  1. e. What is the phenotype of this individual?
  2. f.        What stage of cell division is represented by this cell (prophase, metaphase, anaphase, or telophase of meiosis I, meiosis II, or mitosis)?
  3. g. After meiosis is complete, how many chromatids and chromosomes will be present in one of the four progeny cells?
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Part 3: Use homologous chromosomes marked with alleles “A” and “a” and a second pair of homologs marked with alleles “B” and “b”. to demonstrate Mendel’s Principle of Independent Assortment in cells in Meiosis. Indicate what phase this happens in meiosis. Part 4: Use AaBb x AaBb and two Punnett squares to demonstrate Mendel’s Principle of Independent Assortment. Write the expected phenotypic ratios under each Punnett square. Now, multiply the probabilities of each event to get combined probabilities for BOTH genes. i.e. the chance of being homozygous recessive for both genes is 1/4 x 1/4 =1/16.
The following diagram shows a hypothetical diploid cell. The recessive allele for albinism is represented by a, and d represents the recessive allele for deafness. The normal alleles for these conditions are represented by A and D, respectively. Please use the symbols A, a, D and d as appropriate to help me understand your answer. a а D 1. According to Mendel's principal of segregation, what is segregating in this cell? 2. According to Mendel's principle of independent assortment, what is independently assorting in this cell? 3. What is the phenotype of this individual? © Cengage Learning
Mendel's second law of independent assortment has its basis in which of the following events of meiosis !? Select one: OO O a. Synapsis of homologous chromosomes b. Separation of homologues at anaphase c. Separation of cells at telophase d. Alignment of tetrads at the equator e. Crossing over

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Human Heredity: Principles and Issues (MindTap Course List)

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