1. Illustrate the crossovers of chromatids and the resulting gametic types of the given crossovers.2. Identify the frequency for each type of recovered chromatids after the crossover.3. Parental genotypes: homozygous dominant for 3 genes (AABBCC)homozygous recessive for 3 genes (aabbcc)Example: Single crossover between genes A and B of nonsister chromatids 2 & 3CrossoversGametic GenotypesChromatids RecoveredParental RecombinantвBb.22ab.1. SCO between genes B and C of nonsister chromatids 2 & 32. DCO between nonsister chromatids 2 & 33. DCO between 2 & 3; 1 and 34. DCO between 2 & 3; 1 & 45. DCO between 1 & 4; 2 & 36. DCO between 1 & 4; 2 & 47. DCO between 2 & 3; 1 & 28. DCO between 1 and 2; 3 & 4

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Answered: 1. SCO between genes B and C of…

1. SCO between genes B and C of nonsister chromatids 2 & 3 2. DCO between nonsister chromatids 2 & 3 3. DCO between 2 & 3; 1 and 3

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter12: Mendel, Genes, And Inheritance

Section: Chapter Questions

Problem 1TYK: The dominant C allele of a gene that controls color in corn produces kernels with color; plants...

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A. 1. Division of the cell nucleus, results in two daughter nuclei, each have the same number of chromosomes as the parent nucleus. 2. One two identical halves of a duplicated chromosome. 3. Fusion of haploid (n) gametes; results in the formation of a diploid (2)n zygote. 4. The breaking and rejoining of homologous (non sister) chromatids during early meiotic prophase I, resulting in an exchange of genetic material. 5. The diploid (2n) cell that results from the union of haploid (n) gametes in sexual reproduction. 6. The condition of having one set of chromosomes per nucleus. 7. The complex of DNA, proteins and some RNA that makes up eukaryotic chromosomes. 8. Structures in the cell nucleus, composed of chromatin and containing the genes. 9. An X-shaped site in a tetrad marking the location where homologous chromatids previously underwent crossing over. 10. A sex cell; in plants and animals, an egg or sperm. 11. Type of reproduction in which two gametes (usually, but not necessarily,…
The dominant C allele of a gene that controls color in corn produces kernels with color; plants homozygous for a recessive c allele of this gene have colorless or white kernels. What kinds of gametes, and in what proportions, would be produced by the plants in the following crosses? What seed color, and in what proportions, would be expected in the offspring of the crosses? a. CCCc b. Cccc c. CcCc
Genetic problems: Use the diagram below to figure out how each monosomy or trisomy can a) Normal X chromosome segregation b) Nondisjunction in meiosis I c) Nondisjunction in meiosis II Diploid cell at start of meiosis First meiotic division Nondisjunction Second meiotic division Nondisjunction 00 00 develop. Benjamim XCuinmi х Х х х Xх хх о о XX O 2. A color-blind man married a normal woman. Their daughter, who was phenotypically normal, married a normal man and the couple produced three children, a normal boy, a color-blind boy, and a color-blind girl. Further examination indicates that this girl has two X chromosomes. Explain the origin of the color- blind girl.
IV. Observation: No Crossing Over Crossing Over Appearance of Gamete Cells Appearance of Gamete Cells V. Analysis: 1. If the two sister chromatids are the same, how are they called? 2. Which specific parts exchanged genetic information during cross over? 3. What is crossing over? 4. When will crossing over occurs? Why? 5. What will happen after crossing over? 6. How do meiosis contributes to genetic variation, while mitosis does not? 7. Why is crossing over important for evolution of species?
. If you were asked to complete the table with the correct answer, which of the following table would you chose? А. CHITERIA MITOSIS MEIOSIS 1. Na. of nuciear dimsion 2. Syriapaia/crossing over ECentromere of suster chromatids atanaphase Preseut separates Fresent M-attached/M-separates Haploid S. Na of chromosomes per daughter cell 6 Function Diplaid Growth. Rapair Growth. Repair and Reproduction B. CRITERIA MITOSIS MEIOSIS TNo, af nuclear darinion Synapsin/croing over 3. Centromere af sister chromatids at anaphase Absetit sepiarates Fresent -attached FNo. of daughter cells 5. No. of chromosomes per daughter cell 6 Function Diploid Haploid Growth, Eapair Growth, Repair and Reproduction C. CRITERIA MITOSIS MEIOSIS 1. No. of muclear division 2. Synapsis/crossing over 3. Centromereof sister chromatids at anaphane 4 Na, af daughter cells 5. No. of chromosoetes per daughter cell 6 Punction Absent Present separates MI-attached/Mli-separates Haploid Diploid Gruwth, Repair Reproduction D.…
14.All of the following could be deduced from the table except CRITERIA MITOSIS MEIOSIS 1. No. of nuclear division 2. Synapsis/crossing over 3. Centromere of sister chromatids at anaphase 4 No. of daughter cells 5. No. of chromosomes per daughter cell 6 Function I. The mother cell in mitosis divides only once, while the mother cell in meiosis divides twice. II. Synapses only takes place in meiosis. III. Centromere of sister chromatids at anaphase separate in both mitosis and meiosis. The number of daughter cells in mitosis is 2, while meiosis is 4. V. Mitosis is haploid, meiosis is diploid. A. I, II, and III B. I, III, IV and V C. I, 1l and IV D. I. II. III. V IV, If you were asked to complete the table with the correct answer, which of the following table would you chose? A. CHITERIA MITOSIS MEIOSIS 1. No. of nuclear dimon Synapais/cossing ove 3. Centromere of NIRter chromatids atanaphase 7No. of daughter cells Present Fresent MI-attachedMuseparates separates Haploid 5. No of…
All of the following could be deduced from the table except CRITERIA MITOSIS MEIOSIS 1. No. of nuclear division 2. Synapsis/crossing over 3. Centromere of sister chromatids at anaphase 4 No. of daughter cells 5. No. of chromosomes per daughter cell 6 Function I. The mother cell in mitosis divides only once, while the mother cell in meiosis divides twice. II. Synapses only takes place in meiosis. III. Centromere of sister chromatids at anaphase separate in both mitosis and meiosis. The number of daughter cells in mitosis is 2, while meiosis is 4. V. Mitosis is haploid, meiosis is diploid. A. I, II, and III B. I, III, IV and V C. I, Il and IV D. I. II. II. V IV, • If you were asked to cormplete the table with the correct answer, which of the following table would you chose? А. CHITERIA MITOSIS MEIOSIS 1. No. of nuciear dimaion Synapais/cossing ove 3. Centromere of NIuzer chromatids atanaphase No. of daaghter cells PTESEnt MI-anached separates Present separates Haploid 5. No of…
4 *The normal color of snapdragons is red. Some pure lines showing variation in flower color have been found. Analyze the following crosses and do the following:² c. Explain the inheritance of these colors (include number of genes, alleles and dominance relationships). d. Determine the genotypes of the parents and the F1 of each cross. e. Propose a biochemical pathway for flower color production in snapdragons. F₂ Parents 1. orange x yellow 2. red x orange 3. red x yellow 4. red x white F₁ orange red red red red 5. yellow x white 9 red: 3 yellow: 4 white 6. orange x white 9 red: 3 orange: 4 white 7. red x white 9 red: 3 yellow: 4 white Hint: Come up with a possible pathway first, it helps to organize your thoughts. red 3 orange: 1 yellow 3 red: 1 orange 3 red: 1 yellow 3 red: 1 white red
1. Down Syndrome (trisomy 21) is caused by an error in meiosis which results in the presence of three chromosome #21s in the individual affected. In what two phases of meiosis could this error occur and, in general, HOW does it occur? 2. You are exploring a new planet when you discover a hexaploid (6n) organism. What is the ploidy of the gametes of wheat after meiosis and cytokinesis (what does 6n become)? 3. If a somatic cell has a diploid number of 4, what would be the result in the final daughter cells after cytokinesis IF in Anaphase, one of the chromosomes did not have a separation of sister chromatids? That is, if the sister chromatids of ONE of the chromosomes stayed together, what would be the chromosome number of each daughter cell? What problems might be caused by this happening?
2) A. Explain how polyribosomes form. B. Why might you expect the insertion of 3 DNA base pairs to be less disruptive than th deletion of a single base pair? C. Compare and contrast mitosis and meiosis with respect to their genetic outcomes? D. What are the possible consequences of non-disjunction during cell division? E. How does meiosis increase genetic diversity in populations?
GI GI Gi gI gi 5 Gi|2|3|X gI 1 gi 4 6 G = green yellow I = inflated i= constricted
37. Answer each question about this diagram: ZWKOI KEY %3D 13 22 1> This individual's sex is female [Choose ] trisomy 21 karyogram 2n 2> The genetic disorder revealed is triplo X 1n 3> This type of diagram is called a genetic map male polyploidy female 4> The ploidy number of this 46 individual is ancuploidy 5> The term to describe this disorder polyploidy as the incorrect pumber of to search :-