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_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_forwardAnalysis of X-Linked Dominant and Recessive Traits The X and Y chromosomes are structurally and genetically distinct. However, they do pair during meiosis at a small region near the tips of their short arms, indicating that the chromosomes are homologous in this region. If a gene lies in this region, will its pattern of transmission be more like that of a sex-linked gene or an autosomal gene? Why?arrow_forward
- In 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_forwardDogs have 78 chromosomes in their somatic cells. How many chromosomes are in their gametes?arrow_forwardChromosomal Basis of Heredity Compare and contrast mitosis and meiosis. In what ways is meiosis II similar to and different from mitosis of a diploid cell? Explain how random chromosomal alignment during metaphase I contributes to variation in gametes produced by meiosis.arrow_forward
- GENETICS In a sexually reproducing diploid organism in which 2n=6, a normal meiocyte in reduction should exhibit a total of 3 bivalents at the metaphase plate. Consider the following organism in the previous statement. if there is no crossing over, the number of possible haploids (gamete) genotypes generated by "chromosome shuffling" during meiosis is _____?arrow_forwardRainbow trout go through a unique genetic reproductive process. Female eggs are diploid, while male sperm are haploid. In the wild, when the sperm fertilizes an egg, the extra set of chromosomes is kicked out, resulting in a diploid offspring.Triploid trout are produced in the lab to provide sterile fish stock for lakes. Shortly after the eggs are fertilized, scientists place them in a warm water bath to prevent the extra chromosomes from being removed. The result is a triploid fish that cannot reproduce.Rainbow Trout: n = 30Select the row that correctly shows the ploidy for the trout at different reproductive stages. Select one: a. Female Egg Male Sperm Offspring Produced in wild Offspring Produced in lab n = 30 2n = 60 3n = 90 2n = 60 b. Female Egg Male Sperm Offspring Produced in wild Offspring Produced in lab 2n = 60 n = 30 2n = 60 2n = 60 c. Female Egg Male Sperm Offspring Produced in wild Offspring Produced in lab 2n = 60 n = 30…arrow_forwardRainbow trout go through a unique genetic reproductive process. Female eggs are diploid, while male sperm are haploid. In the wild, when the sperm fertilizes an egg, the extra set of chromosomes is kicked out, resulting in a diploid offspring.Triploid trout are produced in the lab to provide sterile fish stock for lakes. Shortly after the eggs are fertilized, scientists place them in a warm water bath to prevent the extra chromosomes from being removed. The result is a triploid fish that cannot reproduce.Rainbow Trout: n = 30 Global warming is an issue affecting many species around the world. Warming has caused the temperatures in lakes and rivers to increase and stay elevated for longer periods of time. Select the FOUR numbers that describe the possible effects of global warming on the reproduction of rainbow trout in the wild and on biodiversity. The extra set of chromosomes remains. The extra set of chromosomes is removed. The offspring are diploid (2n). The offspring are triploid…arrow_forward
- At the end of Meiosis II in human cells (specifically in males, for example), how many gametes are made from one original parent cell, how many chromosomes are in each gamete, and what is each chromosome made of (that is, if you compared, say, chromosome #1 in a gamete with the two #1 chromosomes the person inherited from his parents)?arrow_forwardDogs have 78 chromosomes in their diploid cells. If a diploid dog cell enters meiosis, how many chromosomes and chromatids will be present in each daughter cell at the end of meiosis I?arrow_forwardDrosophila melanogaster, the common fruit fly, has 4 chromosomes in each of its gametes. How many chromosomes are in each somatic cell?arrow_forward
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