Question - Predict the types of gametes that are formed if non-disjunction of the X chromosomeoccurs in the 1st division. Click on all the different possible gamete types of sperm that could be formed (in terms of the X and Y chromosome, assume that the gamete is normal, having one of all the other chromosome types). X (normal) Y (normal) no X or Y (abnormal) XY (abnormal) YY (abnormal) XX (abnormal)

Question - Predict the types of gametes that are formed if non-disjunction of the X chromosomeoccurs in the 1st division. Click on all the different possible gamete types of sperm that could be formed (in terms of the X and Y chromosome, assume that the gamete is normal, having one of all the other chromosome types). X (normal) Y (normal) no X or Y (abnormal) XY (abnormal) YY (abnormal) XX (abnormal)

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter20: The Reproductive System

Section: Chapter Questions

Problem 11RE

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Formation of Gametes The following cell completed interphase and replicated the chromosomes for meiosis. During the formation of gametes, the chromosomes failed to separate properly during meiosis. Complete the table below by indicating the two possible stages in meiosis where nondisjunction could occur and the possible combination of gametes. A) Type of Nondisjunction (Identify the meiotic stage.): _______________________ Daughter Cell 1 Daughter Cell 2 Daughter Cell 3 Daughter Cell 4 Number of Chromosomes in Each Daughter Cell B) Type of Nondisjunction (Identify the meiotic stage.): _______________________ Daughter Cell 1 Daughter Cell 2 Daughter Cell 3 Daughter Cell 4 Number of Chromosomes in Each Daughter Cell
Fill in the cells below showing the NORMAL process of meiosis of the male's sex chromosomes (XY – the X and Y are representing the entire chromosome, and remember X and Y act like a homologous pair). DO NOT show crossing over. prior to meiosis 44 +XY What are the possible normal gametes produce after meiosis division? Identify the possible sex of the offspring if these normal sperm cells are fertilized by the egg cell.
Fill in the cells below showing the process of meiosis of the male's sex chromosomes with non- disjunction occurring during meiosis I. DO NOT show crossing over. Prior to meiosis 44 +XY What are the possible abnormal gametes the male can produce with non-disjunction occuring in Meiosis I? Identify the possible sexual aneuploidy syndrome if these abnormal sperm cells are fertilized by a normal egg cell. Could this man father a Tuner syndrome (XO) child? Could this man father a Klinefelter's syndrome child (XXY)?
Fill in the cells below showing the process of meiosis of the male's sex chromosomes with non- disjunction occuring during meiosis II. DO NOT show crossing over. Prior to meiosis 44 +XY What are the possible abnormal gametes the male can produce with non-disjunction occurring in Meiosis II? Identify the possible sexual aneuploidy syndrome if these abnormal sperm cells are fertilized by a normal egg cell. Could this man father a Tuner syndrome (XO) child? Could this man father a Klinefelter's syndrome child (XXY)?
A primary spermatocyte has the genotype DdEe. These genes assort independently at Meiosis I. Show the chromosomes containing these genes at Metaphase I, Telophase I and Telophase II using diagrams. Diagrams must be clearly labelled and show metacentric chromosomes undergoing meiosis.
MULTIPLE CHOICE: Select the BEST ANSWER for each item by ENCIRCLING THE LETTER corresponding to the best choice. Which of the following statements is INCORRECT? The halving of chromosome number during gamete formation, followed by the union of two gametes at fertilization, allows a constant 2n number of chromosomes to be maintained from generation to generation in all individuals of a species. Meiosis ensures that all somatic cells of the developing individual have identical diploid chromosome sets. The number of chromosomes in a normal diploid cell is 2n. Gametes and other cells that carry only a single set of chromosomes are called haploid. Which of the following statements is INCORRECT? Scientists usually analyze the chromosomal makeup of a cell during metaphase because this is when the chromosomes are most visible. During metaphase, individual chromosomes have duplicated and condensed from thin threads into compact rod-like structures. Each chromosome, during metaphase,…
There are 9 pairs of chromosomes given. This undergoes mitosis and meiosis 1. -Draw the metaphase 1 and anaphase 1.
Question: Hand draw meiosis (I and II). Start with 2 pairs of homologous chromosomes. Chromosomes in each pair should look the same BUT should be distinctly different from the other pair of chromosomes.
A primary spermatocyte has the genotype AaBbee. The A and B loci are linked in cis configuration on the long arm of an acrocentric chromosome. The E locus is on a metacentric chromosome. Show the chromosomes containing these genes at Metaphase I, Telophase I and Telophase II using diagrams. Diagrams must be clearly labelled
a. What phase of meiosis is this cell undergoing? b. Identify the 3 things that are incorrect in terms of this cells structure and organization? c. Would this cell produce viable gametes? Why or why not.
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?
Meiosis DrawingIn this assignment you will track and draw the chromosomes of a diploid organism through all the stages of meiosis. Make sure you label the alleles for genes on the chromosomes the whole way through - every chromatid should have labeled alleles. For meiosis, both crossing over and independent assortment can occur. For the purpose of this exercise, assume that there is a single crossover event on the long chromosome between the A and D genes. Only show crossing over after its fully occured. There are no crossover events on the short chromosome. Regarding independent assortment, there are two possible outcomes in meiosis if there are two homologous pairs of chromsomes. Include both independent assortment possibilities - one on the left side and one on the right. Fill in the possible gamete genotypes for each outcome. If you do this correctly you should end up with 8 different types of gametes.