Biology: The Unity and Diversity of Life (Looseleaf)
15th Edition
ISBN: 9781337408417
Author: STARR
Publisher: CENGAGE L
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Chapter 12, Problem 4SQ
Summary Introduction
Introduction: The sexual reproduction in animals is classified mainly into 2 types, asexual and sexual reproductions. In the sexual reproduction, there involves the fusion of the male and female gamete through the process of fertilization that are produced either by the same organisms ( hermaphrodite or bisexual ) or by the different organisms( female or male ) which results in the formation of zygote that can soon develop into a new organisms.
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Chapter 12 Solutions
Biology: The Unity and Diversity of Life (Looseleaf)
Ch. 12 - BPA and Abnormal Meiosis In 1998, researchers at...Ch. 12 - BPA and Abnormal Meiosis In 1998, researchers at...Ch. 12 - BPA and Abnormal Meiosis In 1998, researchers at...Ch. 12 - One evolutionary advantage of sexual over asexual...Ch. 12 - Prob. 2SQCh. 12 - Prob. 3SQCh. 12 - Prob. 4SQCh. 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 - Which of the following cells can undergo meiosis?...Ch. 12 - Prob. 9SQCh. 12 - Crossing over mixes up ______. a. chromosomes b....Ch. 12 - Crossing over happens during which phase of...Ch. 12 - Prob. 12SQCh. 12 - Which of the following is one of the very...Ch. 12 - Match each term with the best description. _______...Ch. 12 - Prob. 15SQCh. 12 - The diploid chromosome number for the body cells...Ch. 12 - In your own words, describe how genetic diversity...Ch. 12 - Make a simple sketch of meiosis in a cell with a...Ch. 12 - Asexually reproducing animal populations are rare,...Ch. 12 - Figure 12-7 shows how meiosis in a cell with three...
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- 1. When a part of a planaria is removed from its body, the part removed develops into a complete individual. A.Heterogamy B.Fragmentation C.Binary Fission D.Regeneration E.Budding 2. The _____are the site of sperm maturation, and they store and convey spermatozoa to the ductus deferens, and when the sperm cells are not ejaculated and reaches their lifespan, the sperm cells _____. A.epididymis; degenerate is recycled B.instertitial cells of the testes; die and become part of the semen C.seminiferous tubules; dissolved by lysosomes D.ejaculatory ducts; die and form a liquid excreted with the urine E.bulbourethral glands; used to create new sperm cells 3. A controversial Filipino teleserye showcases a twin with different fathers, this could ONLY be true when which of the following circumstances are met. A.this could never happen, its fiction B.the mother had multiple ovulation C.the twins should be fraternal D.choices A,B and C are…arrow_forwardGastrulation... A. Is a specialized form of cell division that partitions the cytoplasm of a fertilized egg B. Refers to the fusion of haploid gametes to give a diploid zygote C. Produces an embryo with either two or three distinct cell layers D. Is a developmental stage consisting of a cell layer surrounding a fluid-filled space E. None of the abovearrow_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
- Genetically unique individuals are produced through ________. a. sexual reproduction b. parthenogenesis c. budding d. fragmentationarrow_forward1. How many spermatids are formed from 10 spermatogonium B? a. 20 b. 40 c. 80 d. 160 2. Oogenic growth is due to the following processes EXCEPT a. increase in ribosomes. b. increase in mRNA transcripts. c. formation of cortical vesicles. d. formation of mitochondrial clouds. 3. The oocyte nucleus is transformed into a germinal vesicle due to the following events EXCEPT a. the formation of cortical granules. b. the formation of the lampbrush chromosomes. c. the increase in the activity of transcription factors d. the amplification of genes for ribosomal RNA synthesis.arrow_forwardSperm and ova are similar in terms of ________. a. size b. quantity produced per year c. chromosome number d. flagellar motilityarrow_forward
- . sperm cells are formed when the generative cell divides by _________ a. one, mitosis b. two, mitosisc. one, meiosis d. two, meiosis e. four, meiosisarrow_forwardWhich of the following correctly describes hermaphroditism? A. It is an example of sexual reproduction because it involves a male and a female. B. It is an example of asexual reproduction because only one individual needs to be involved. C. It is an example of sexual reproduction because it involves fusion of two gametes. D. It is an example of asexual reproduction because the offspring are genetically identical to the parent.arrow_forwardCleavage... A. Is a developmental stage consisting of a cell layer surrounding a fluid-filled space B. Is a specialized form of cell division that partitions the cytoplasm of a fertilized egg C. Refers to the fusion of haploid gametes to give a diploid zygote D. Produces an embryo with either two or three distinct cell layers E. None of the abovearrow_forward
- The process of gastrulation forms the _______. a. blastula b. zygote c. organs d. germ layersarrow_forwardEndoderm, Mesoderm, and Ectoderm are formed during ________. a. Gametogenesis b. Cleavage c. Gastrulation d. Organogenesisarrow_forwardand humans, the ___ determines the sex of the offspring because ___ A. male... The mail can contribute either X or Y B. female… Only the female provides cytoplasm to the zygote C. Male… The sperm can fertilize either a female or a male egg D. Female… Only the female has two functional sex chromosomearrow_forward
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