For this DTL, you will compare key stages of mitosis and meiosis. Not all stages are shown. Use the template attached HERE which starts with a "parent" cell that is 2n=4. Use / for unreplicated chromosomes and X for replicated chromosomes. Make sure nonhomologs are different sizes. Put alleles A and a on the large pair of homologs and alleles B and b on the small pair of homologs. (Put these letters by the little mark on each chromosome. Each letter represents one of a thousand genes along that chromosome.) Use a metaphase plate that is vertical. Do not indicate the nuclear membrane, spindles or that the chromosomes are decondensed (unwound) in interphase. For each cell, label # n (ploidy #, haploid or diploid)=____ (#chromosomes) and amount for DNA versus a gamete which is 1x.

For this DTL, you will compare key stages of mitosis and meiosis. Not all stages are shown. Use the template attached HERE which starts with a "parent" cell that is 2n=4. Use / for unreplicated chromosomes and X for replicated chromosomes. Make sure nonhomologs are different sizes. Put alleles A and a on the large pair of homologs and alleles B and b on the small pair of homologs. (Put these letters by the little mark on each chromosome. Each letter represents one of a thousand genes along that chromosome.) Use a metaphase plate that is vertical. Do not indicate the nuclear membrane, spindles or that the chromosomes are decondensed (unwound) in interphase. For each cell, label # n (ploidy #, haploid or diploid)=____ (#chromosomes) and amount for DNA versus a gamete which is 1x.

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter6: Cytogenetics: Karyotypes And Chromosome Aberrations

Section: Chapter Questions

Problem 14QP: Variations in Chromosome NumberAneuploidy Describe the process of nondisjunction and explain when it...

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Imagine a germ cell for an animal that is 2n=4. Gene A and B are found on chromosome one, and the cell is homozygous for A(AA) and heterozygous for Bb. Gene D is found on chromosome 2 and the germ cell is heterozygous for the Allee of the gene (Dd). Meiosis for this germ cell results in the following four gametes, and one crossing over event during meiosis ABD, ABd, AbD, Abd. Draw the chromosomes in cell during metaphase of meiosis 1. Make sure to include chromosomes, the allele in the correct locations on the chromosomes AFTER the crossing over event, and spindle fibers.
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An equational division of mitosis is occuring for a diploid organism that has three heterologous chromosomes. One acrocentric, one metacentric and one telocentric. The organism is tetrahybrid and heterozygous for dominant and recessive alleles at four different loci. The parental genotypes were AAbbCCDD and aaBBccdd. Locus A and B are on the telocentric chromosome. Locus C is on a metacentric chromosome. Locus D is on the acrocentric chromosome. Part A: How many chromosomes are observed during anaphase? Part B: For cells of this organism that undergo meiosis, how many tetrads are observed during metaphase I? Part C: What is the n value for this organism?
An equational division of mitosis is occuring for a diploid organism that has three heterologous chromosomes. One acrocentric, one metacentric and one telocentric. The organism is tetrahybrid and heterozygous for dominant and recessive alleles at four different loci. The parental genotypes were AAbbCCDD and aaBBccdd. Locus A and B are on the telocentric chromosome. Locus C is on a metacentric chromosome. Locus D is on the acrocentric chromosome. Question: How many distinct gametes are possible if this cell goes through meiosis? Please write out calculation/work!!
An equational division of mitosis is occuring for a diploid organism that has three heterologous chromosomes. One acrocentric, one metacentric and one telocentric. The organism is tetrahybrid and heterozygous for dominant and recessive alleles at four different loci. The parental genotypes were AAbbCCDD and aaBBccdd. Locus A and B are on the telocentric chromosome. Locus C is on a metacentric chromosome. Locus D is on the acrocentric chromosome. Question: Draw one possible representation of the chromosomes in a cell after the equational division of meiosis. Include all centromeres, chromatids and alleles.
An equational division of mitosis is occuring for a diploid organism that has three heterologous chromosomes. One acrocentric, one metacentric and one telocentric. The organism is tetrahybrid and heterozygous for dominant and recessive alleles at four different loci. The parental genotypes were AAbbCCDD and aaBBccdd. Locus A and B are on the telocentric chromosome. Locus C is on a metacentric chromosome. Locus D is on the acrocentric chromosome. Question 3: What is the n value for this organism?