Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 12, Problem 2DAA
Summary Introduction
To determine: The group of mice that had the most abnormalities in their oocytes.
Introduction: BPA is a synthetic chemical that mimics the female sex hormone (estrogen) that is found in the animals. Bisphenol A (BPA) is used in the manufacturing of different plastics including polycarbonate plastics such as dental sealants, baby bottles, and food and drink containers. Research studies show that these chemicals possess capability to disrupt the meiotic division and then damage the reproductive function of the organism (experiments conducted in the mice oocytes).
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Chapter 12 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 12 - One evolutionary advantage of sexual over asexual...Ch. 12 - Meiosis is a necessary part of sexual reproduction...Ch. 12 - Meiosis _________. a. occurs in all eukaryotes b....Ch. 12 - Sexual reproduction in animals requires ______. a....Ch. 12 - Meiosis ______ the parental chromosome number. a....Ch. 12 - Dogs have a diploid chromosome number or 78. How...Ch. 12 - The cell in the diagram to the right is in...Ch. 12 - Prob. 8SQCh. 12 - Prob. 1DAACh. 12 - Prob. 2DAA
Ch. 12 - Prob. 3DAACh. 12 - Prob. 9SQCh. 12 - Crossing over mixes up ______. a. chromosomes b....Ch. 12 - Crossing over happens during which phase of...Ch. 12 - Which of the following is one of the very...Ch. 12 - Match each term with the best description. __...Ch. 12 - ________ contributes to variation in traits among...Ch. 12 - The diploid chromosome number for the body cells...Ch. 12 - In your own words, explain why sexual reproduction...Ch. 12 - Different populations of the tiny freshwater...Ch. 12 - Make a simple sketch of meiosis in a cell with a...
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- A cell from a human female has just undergone mitosis. For unknown reasons, the centromere of chromosome 7 failed to divide. Describe the chromosomal contents of the daughter cells.arrow_forwardFruit flies (Drosophila melanogaster) are a common model organism in genetics labs. A somatic cell in D. melanogaster has 2n = 8. How many chromosomes will a D. melanogaster female gamete contain?arrow_forwardWithin the blank cells, draw the phases of meiosis using 3 chromosome pairs. Thank youarrow_forward
- Answer to meiosis II in a femalearrow_forwardEqualizing the Expression of X Chromosome Genes in Males and Females Individuals with an XXY genotype are sterile males. If one X is inactivated early in embryogenesis, the genotype of the individual effectively becomes XY. Why will this individual not develop as a normal male?arrow_forwardVariations in Chromosome NumberAneuploidy Describe the process of nondisjunction and explain when it takes place during cell division.arrow_forward
- Meiosis and germ cell formation in cell with four choromossomes can you see how chromosome segrate when germ cell are formed?arrow_forwardProtein complex present at centromeres in mitotic cells structure formed when DNA wraps around an octameric histone core Protein complex that is degraded at anaphase to allow sister chromatids to separate at mitosis microtubule based structure used to segregate chromosomes in mitosis and meiosis 1. cohesin complex 2. kinetochore 3. monopolin 4. nucleosome 5. synaptonemal complex 6. telomere 7. sister chromatid 8. spindlearrow_forwardHuman Somatic (non reproductive) cells have 46 chromosomes organized into 23 pairs. A human somatic cell goes into mieosis, how many chromosomes does each resultant daughter cell have?arrow_forward
- a. What type of cell division mitosis, meiosis I or meiosis II is shown in this figure? b. What is the diploid number of this organism? c. Provide labels for (i) and (ii)arrow_forwardIn a turtle species, a diploid cell in the G1 phase of the cell cycle contains 22 picograms of DNA (picogram is a measure of the total mass of the DNA present). How much DNA is present in a cell of the same species at prophase II of meiosis (prophase of the second meiotic division)?arrow_forwardThe image below shows a somatic cell from an organism for which 2n = 4 (the cell from the image below). Which of the cells beneath it (cells A, B, C or D) could be a gamete from this organism? Explain why you chose the cell you did discussing the changes in chromosome number nd DNA content of a cell throughout the cell cycle. You should also explain if any of the other images could represent a cell from this organism in stages of meiosis or mitosis or other stages of the cell cycle. X Xx C "₁ XX B XX X Xarrow_forward
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