BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Chapter 9, Problem 2PIT
Summary Introduction
To design:
A separate concept map that includes the terms crossing over, gametes, autosome, and homologus pair and may also contain other related terms.
Introduction:
Meiosis is a form of cell division in which one cycle of chromosomal replication is followed by two successive cell divisions to produce four haploid cells. In meiosis, crossing over is responsible for the production of new combinations of genes.
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Drag the X and Y chromosomes to the drawings below, lining them up properly for metaphase I and
metaphase II of meiosis for a male. A pair of autosomes is already included in the drawings, and a
diploid cell is shown at the left for reference.
Diploid
cell
Autosomes
X
YY
8
a
Sex
chromosomes
Metaphase II
Gametes
Metaphase I
A X
{
Xy Xy
aa
XX
AA aa
XX YY
X X
XX a a
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 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.
Chapter 9 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
Ch. 9.1 - Prob. 1MCCh. 9.1 - Prob. 2MCCh. 9.1 - Prob. 3MCCh. 9.2 - Prob. 1MCCh. 9.2 - Draw a karyotype for a cell with a diploid number...Ch. 9.2 - Prob. 3MCCh. 9.3 - Prob. 1MCCh. 9.3 - Prob. 2MCCh. 9.3 - Prob. 3MCCh. 9.3 - Prob. 4MC
Ch. 9.4 - Prob. 1MCCh. 9.4 - Prob. 2MCCh. 9.5 - Prob. 1MCCh. 9.5 - Prob. 2MCCh. 9.5 - Prob. 3MCCh. 9.6 - Prob. 1MCCh. 9.6 - In what ways are mitosis and meiosis different?Ch. 9.7 - Prob. 1MCCh. 9.7 - Prob. 2MCCh. 9.7 - Draw a diagram to show how nondisjunction of all...Ch. 9.7 - Prob. 4MCCh. 9.7 - Prob. 5MCCh. 9 - Prob. 1MCQCh. 9 - Prob. 2MCQCh. 9 - Prob. 3MCQCh. 9 - Prob. 4MCQCh. 9 - Prob. 5MCQCh. 9 - Which of the following best describes what happens...Ch. 9 - Prob. 7MCQCh. 9 - Explain why evolution often selects traits that...Ch. 9 - Prob. 2WIOCh. 9 - Sketch the relationships among mitosis, meiosis,...Ch. 9 - What is the difference between haploid and diploid...Ch. 9 - In some animals, females can reproduce by...Ch. 9 - How are mitosis and meiosis different?Ch. 9 - Prob. 7WIOCh. 9 - Prob. 8WIOCh. 9 - List some examples of chromosome abnormalities,...Ch. 9 - Some large companies in the United States cover...Ch. 9 - Prob. 1PITCh. 9 - Prob. 2PITCh. 9 - Where do the members of each pair of homologous...Ch. 9 - Review section 9.5 and the Survey the Landscape...
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- A diploid cell undergoes meiosis to form the four gametes shown below. H q H q Q h harrow_forwardHow many different types of gametes can be formed (see attached) and explain the calculation method? Please take a look at the attachment.arrow_forwardHow do organisms with haploid-dominant life cycles ensure continued genetic diversification in offspring without using a meiotic process to make gametes? Explain your reasoning. Write 3 paragraphs, 3-5 sentences each.arrow_forward
- A cat germ cell has a haploid number of 19 chromosomes.Complete the following table by stating the number of cells, the number of chromatids, and the number of chromosomes at the end of each of the following stages of meiosis and mitosis. (Please note this is an emply chart, I'm unsure why it got declined last time because it is not graded) Meiosis Meiosis Mitosis Prophase I Telophase I Telophase Number of cells Number of Chromatids Number of Chromosomesarrow_forwardThis figure shows a grasshopper testis with differential staining and viewed under a microscope. Encircle the cell and label the specific stage in meiosis it displays. Identify as many as you can with a minimum of two cells representing different stages. Make sure to specify whether the stage belongs to meiosis I or II. If you identify a cell at prophase I, then specify the substagearrow_forwardWhich meiotic division(s) reduce(s) chromosome number (i.e., meiosis I, meiosis II, or both)? Explain your answer. Edit View Insert Format: Toold Tablarrow_forward
- Identify the stages of meiosis described by the following meiotic events/conditions/terms. Write prophase I, metaphase I, anaphase I, telophase I, prophase II, metaphase II, anaphase II, or telophase II. In case the events are found in both stages, write the stages both. 1. Separation of homologous chromosome 2. Four haploid daughter cells are formed.arrow_forward, Draw a line down the middle of the page. On the LEFT side of the line, draw and label the following stages of Meiosis (in order): Metaphase I (one circle at the top of the page), Metaphase II (two circles, in the middle of the page) and gamete (four circles, at the bottom of the page). Start with a cell that is 2n=4 with two large and two small chromosomes. Make one “set” (one large and one small chromosome) the same color, and the other set a different color. Label one of the large chromosomes with allele “A” and the other allele “a”, like we did in class. Label one of the small chromosomes with allele “B” and the other allele “b”.) For replicated chromosome draw an X and for single chromatids draw a line ( / ). Since we are focusing on the DNA, you can skip drawing the nuclear membrane or spindle fibers. For simplicity, do not indicate crossover in your diagrams. Now on the right side of the line on your page, please draw the second independent way homologs could line up Metaphase…arrow_forwardIdentify the stages of meiosis described by the following meiotic events/conditions/terms. Write prophase I, metaphase I, anaphase I, telophase I, prophase II, metaphase II, anaphase II, or telophase II. In case the events are found in both stages, write the stages both. 1. Formation of chiasma 2. Each chromatid is considered as full-fledged chromosome. 3. Chromosomes begin to pair off. 4. Spindle microtubules start to attach to the centromere. 5. Tetrads are aligned at the middle of the cell. 6. The sister chromatids separate. 7. Produce 2 haploid daughter cells. 8. The chromosomes line up at the middle of the cell. 9. The sister chromatids move together to the opposite poles. 10. The chromatids reach the poles. 11. The chromosomes in each daughter cell are still duplicated.12. Spindle microtubules attach in the centromere of each haploid daughter cell. 13.arrow_forward
- Encircle the cell and label the specific stage in meiosis it displays. Identify as many as you can with a minimum of two cells representing different stages. Make sure to specify whether the stage belongs to meiosis I or II. If you identify a cell at prophase I, then specify the substage.arrow_forwardA couple comes into a fertility clinic. A chromosome preparation is made for each and the male is found to have an aberrant karyotype. He is heterozygous for two sets of reciprocal translocations involving four different chromosome pairs. What proportion of his gametes are expected to be functional and viable?arrow_forwardShown below is a list of statements. Choose ALL the statements below that is/are TRUE for meiosis. Question 1 options: Replication of genetic material followed by a single cell division Ensures the Mendelian law of equal segregation and independent assortment Replication of genetic material followed by two cell divisions Underlie linkage recombination of gene alleles.arrow_forward
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