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 3DAA
Summary Introduction
To determine: The abnormality of metaphase I that takes place in the oocytes shown in the Fig. 12.11 B, 12.11 C, and 12.11 D.
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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Drosophila melanogaster, the common fruit fly, has 4 chromosomes in each of its gametes. How many chromosomes are in each somatic cell?
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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_forwardQuestion : if our society the women are often blamed for given brith to daughters .can you explain why this is not correct ?(or) justify the fact that in human beings , sex of the child is determined by father , not by mother .? Answer ; All human being's have 23 pairs of chromosome .Human males have 22 pairs at autosomes and coutain one or two types of sex chromosome .they are either X And Y .on contrary, females have 22 pairs of autosomes and contain only the X sex chromosome .the Sex of an individual is determined by the type of the male gametes (X or Y) , which fuses with the X chromosome of the female. Ic the fertilizing sperms is X , then the baby will be girl and if it is Y, then the baby will be boy .Hence , it is incorrect to blame a women for the gender of the child.arrow_forwardHuman somatic cells have 46 chromosomes. How many chromosomes are present in human cells undergoing each of the following phases of meiosis? Interphase - Answer: 0 2 3 4 6 9 2 Prophase I - Answer: 0 2 3 4 6 9 2 Prophase II - Answer: 0 2 3 4 6 9 2 Telophase I - Answer: 0 2 3 4 6 9 2 Telophase II - Answer: 0 2 3 4 6 9 2arrow_forward
- Fruit 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_forwardAnswer to meiosis II in a femalearrow_forward
- Equalizing 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_forwardHello, i understand the question, but i only need to know which option is right, no need for explanation. I mean jsut say which option, thanks in advance.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_forwardIn mice, 2n = 40. If a mouse cell divides by mitosis, it will produce two daughter cells that each have ________ chromosomes. If a mouse cell divides by meiosis, it will produce four daughter cells that each have ________ chromosomes. Type the appropriate number to fill in each blank (e.g., 40).arrow_forward
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