BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 12, Problem 13SA
Match each term with its description.
| ___interphase | a. different forms of a gene |
| ___metaphase I | b. useful for varied offspring |
| ___alleles | c. none between meiosis I and meiosis II |
| ___zygotes | d. chromosome lineup |
| ___gametes | e. haploid |
| ___males | f. form at fertilization |
| ___prophase I | g. mash-up time |
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Match the chromosome terms appropriately. ___ polyploid a. symptoms of a genetic ___ deletion disorder ___ aneuploidy b. chromosomal mashup ___ translocation c. extra sets of chromosomes ___ syndrome d. gets around ___ transposable e. chromosome loses a chunk element of DNA f. one extra chromosome
When does DNA replication take place regarding meiosis? DNA replication___ (select one)
A. Occurs between meiosis I and meiosis II
B. occurs during Prophase I
C. occurs before meiosis I begins
D. does not take place in cells best into undergo meiosis
Chapter 12 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 12 - One evolutionary advantage of sexual over asexual...Ch. 12 - Alternative forms of the same gene are called...Ch. 12 - Meiosis is a necessary part of sexual reproduction...Ch. 12 - Meiosis ________. a. occurs only in germ cells of...Ch. 12 - Sexual reproduction in animals requires ________ ....Ch. 12 - Dogs have a diploid chromosome number of 78. How...Ch. 12 - Prob. 7SACh. 12 - Prob. 8SACh. 12 - Crossing over mixes up _______ . a. chromosomes c....Ch. 12 - Crossing over happens during which phase of...
Ch. 12 - _________ contributes to variation in traits among...Ch. 12 - Which of the following is one of the very...Ch. 12 - Match each term with its description....Ch. 12 - In your own words, explain why sexual reproduction...Ch. 12 - Make a simple sketch of meiosis in a diploid germ...Ch. 12 - The diploid chromosome number for the body cells...
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- BPA and Abnormal Meiosis In 1998, researchers at Case Western University were studying meiosis in mouse oocytes (germ cells) when they saw an unexpected and dramatic increase of abnormal events (FIGURE 12.6). Improper segregation of chromosomes during meiosis is one of the main causes or human genetic disorders. The spike in abnormal meiosis began right after the mouse facility started washing the animals' plastic cages and water bottles in a new, alkaline detergent. The detergent had damaged the plastic, which as a result was leaching bisphenol A (BPA). BPA is a synthetic chemical that mimics estrogen, the main female sex hormone in animals. Though it has since been banned for use in baby bottles, BPA is still widely used to manufacture other plastic items and epoxies (such as the coating on the inside of metal cans of food). BPA-free plastics are often manufactured with a related compound, bisphenol S (BPS), that has effects similar to BPA. FIGURE 12.6 Abnormalities in meiosis that occurred after exposure to BPA. Top, the most abnormal meiosis events occurred in mice that were housed in damaged plastic caging with damaged plastic bottles. Damaged plastic releases BPA. Bottom, fluorescent micrographs show the chromosomes (red) and spindle (green) in nuclei of mouse germ cells in metaphase I. A Normal metaphase; BD abnormal metaphase. What percentage of mouse oocytes displayed abnormalities of meiosis with no exposure to damaged caging?arrow_forwardMatch the specific phase of meiosis with the correct description._____ Prophase I a. Homologous chromosomes arrive atopposite poles._____ Metaphase I b. Homologous chromosomes line up._____ Anaphase I c. Chromosomes line up at the equator._____ Telophase I d. Independent assortment occurs._____ Prophase II e. Separated sister chromatids arrive atopposite poles._____ Metaphase II f. Sister chromatids remain condensed._____ Anaphase II g. Crossing over occurs._____ Telophase II h. Sister chromatids pull apart.arrow_forwardMeiosis is a necessary part of sexual reproduction because it_____ . a. divides two nuclei into four new nuclei b. reduces the chromosome number for gametes c. gives rise to new allelesarrow_forward
- HeLa Cells Are a Genetic Mess HeLa cells can vary in chromosome number. Defects in proteins that orchestrate cell division result in descendant cells with too many or too few chromosomes, an outcome that is one of the ha1lmarks of cancer cells. The panel of chromosomes in FIGURE 11.9, originally published in 1989, shows all of the chromosomes in a single metaphase HeLa cell. FIGURE 11.9 Karyotype of HeLa showing chromosomes in one cell. What is the chromosome number of this HeLa cell?arrow_forwardMitosis reduces the chromosome number fro diploid to haploid for the production of gametes. True False 2. During prophase I of meiosis, homologous pairs line up in a process called ______. cytokinesis anaphase synapsis non disjunction 3. During meiosis, sister chromatids separate during Anaphase I Anaphase II telophase I metaphase I 4. Gametes produced during meiosis are genetically identical. True False 5. Failure of either homologous pairs or sister chromatids to separate during meioisis is called _____. crossover translocation dislocation non disjunctionarrow_forwardThis picture represents a cell undergoing meiosis. Which phase of meiosis does this represent? 1. metaphase 1 2. anaphase 1 3. anaphase 2 4. metaphase 2arrow_forward
- B C. D E H. K Match the illustration to the name of the stage.arrow_forwardWhich term describes chromosomes whose centromeres are located at the end of the chremosome? Humans have no none of these. Ometacentric O acrocentric O telorentric O helacentricarrow_forwardEffects of Kartagener Syndrome An abnormal form of the motor protein dynein causes Kartagener .syndrome, a genetic disorder characterized by chronic sinus and lung infections. Biofilms form in the thick mucus that collects in the airways, and the resulting bacterial activities and inflammation damage tissues. Men affected by Kartagener syndrome can produce sperm (FIGURE 4.20) but are typically infertile; some of them have become fathers after their sperm cells were injected directly into eggs. Review Figure 4.19, then explain these observations. FIGURE 4.20 An effect of Kartagener syndrome. Cross-section of a sperm flagellum an affected man (left) and an unaffected man (right).arrow_forward
- Gametes Meiosis Fertilization Zygote (2n 2n Diploid multicellular organism Mitosis (a) Animals What process allows an organism to go from a zygote to a multicellular organism. 26 etv S MacBook Air DII DD 80 F5 F7 F8 F9 F10 F2 F3 #3 $ & 4 9. 7 8 E Y U D F H J K M. Rarrow_forwardHomologous chromosomes move towards opposite poles of a dividing cell during Select one: O a. meiosis II Ob. meiosis I Oc. mitosis C. Od. fertilisation O e. binary fission Clear my choice Next pagearrow_forwardPls send me answer of both the parts in details with explanation and i will surely rate you for good.arrow_forward
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