ANATOMY AND PHYSIOLOGY THE UNITY OF FORM
9th Edition
ISBN: 9781264807123
Author: SALADIN
Publisher: MCG
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Chapter 27.4, Problem 3AYLO
Summary Introduction
To discuss:
The nine stages of meiosis which includes four stages in meiosis- I, and four stages in meiosis – II. Interkinesis stage and events of each stages. The final number of functional daughter cells and chromosome number and final chromosome structures in male
Introduction:
Meiosis is a cell division that involves the chromosome reduction division. Meiosis occurs in almost all germ cells by which the gametes are produced in the reproductive organs. In humans, meiosis occurs in sperm and ova.
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If nondisjunction takes place in a spermatocyte in
the second meiotic division and the sperm fertilizes
a normal egg, the resulting infant may have
three copies of each chromosome
three copies of chromosome 13,18 or 21
three copies of chromosome 13,18, 21 or a normal
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a normal number of chromosomes
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A sexually reproducing organism has a haploid number of 4, consisting of two metacentric chromosomes and 2 telocentric chromosomes. Diagrammatically show the primary meiocyte in metaphase I, and the results of meiosis I and meiosis II.
Comparison and contrast of meiosis 1 and meiosis 2. In which organisms does it miosis occur? Mitosis in which organisms does it occur?
Chapter 27 Solutions
ANATOMY AND PHYSIOLOGY THE UNITY OF FORM
Ch. 27.1 - Essential characteristics of sexual reproduction;...Ch. 27.1 - Multiple functions of the male and female...Ch. 27.1 - Prob. 3AYLOCh. 27.1 - Prob. 4AYLOCh. 27.1 - Prob. 5AYLOCh. 27.1 - Fates of the mesonephric and paramesonephric ducts...Ch. 27.1 - Structures of the embryonic genital tubercle,...Ch. 27.1 - Prob. 8AYLOCh. 27.2 - Anatomy and functions of the scrotum and spermatic...Ch. 27.2 - Prob. 2AYLO
Ch. 27.2 - Prob. 3AYLOCh. 27.2 - The germinal epithelium of the seminiferous...Ch. 27.2 - The arterial supply and venous drainage of the...Ch. 27.2 - Gross anatomy of the epididymis; the series of...Ch. 27.2 - Three sets of male accessory glands: their...Ch. 27.2 - Prob. 8AYLOCh. 27.2 - Prob. 9AYLOCh. 27.3 - Definitions of puberty and adolescence; the...Ch. 27.3 - Prob. 2AYLOCh. 27.3 - Prob. 3AYLOCh. 27.3 - Prob. 4AYLOCh. 27.3 - Changes in the levels of testosterone, inhibin,...Ch. 27.3 - Prob. 6AYLOCh. 27.4 - Prob. 1AYLOCh. 27.4 - Why meiosis is necessary in sexually reproducing...Ch. 27.4 - Prob. 3AYLOCh. 27.4 - Prob. 4AYLOCh. 27.4 - The origin of primordial germ cells, their...Ch. 27.4 - Prob. 6AYLOCh. 27.4 - Prob. 7AYLOCh. 27.4 - Prob. 8AYLOCh. 27.4 - Prob. 9AYLOCh. 27.4 - Prob. 10AYLOCh. 27.4 - Prob. 11AYLOCh. 27.5 - Blood vessels of the penis and how they function...Ch. 27.5 - Prob. 2AYLOCh. 27.5 - Prob. 3AYLOCh. 27.5 - The mechanism of erection including the roles of...Ch. 27.5 - The physiological state of the male in the plateau...Ch. 27.5 - Prob. 6AYLOCh. 27.5 - Prob. 7AYLOCh. 27 - The ductus deferens develops from the _______.of...Ch. 27 - The protein that clots and causes the stickiness...Ch. 27 - The expulsion of semen occurs when the...Ch. 27 - Prob. 4TYRCh. 27 - The penis is attached to the pubic arch by crura...Ch. 27 - The first hormone secreted at the onset of puberty...Ch. 27 - Prob. 7TYRCh. 27 - Four spermatozoa arise from each a. primordial...Ch. 27 - The point in meiosis at which sister chromatids...Ch. 27 - Blood is forced out of the penile lacunae by...Ch. 27 - Prob. 11TYRCh. 27 - Prob. 12TYRCh. 27 - Prob. 13TYRCh. 27 - Prob. 14TYRCh. 27 - Prob. 15TYRCh. 27 - Prob. 16TYRCh. 27 - Prob. 17TYRCh. 27 - Prob. 18TYRCh. 27 - Erection of the penis occurs when nitric oxide...Ch. 27 - A sperm penetrates the egg by means of enzymes in...Ch. 27 - crypto-Ch. 27 - Prob. 2BYMVCh. 27 - Prob. 3BYMVCh. 27 - Prob. 4BYMVCh. 27 - Prob. 5BYMVCh. 27 - meio-Ch. 27 - Prob. 7BYMVCh. 27 - Prob. 8BYMVCh. 27 - someCh. 27 - Prob. 10BYMVCh. 27 - Testosterone is secreted by the nurse cells of the...Ch. 27 - Prob. 2WWTSCh. 27 - Prob. 3WWTSCh. 27 - Prob. 4WWTSCh. 27 - A high testosterone level makes a fetus develop a...Ch. 27 - Prob. 6WWTSCh. 27 - Prob. 7WWTSCh. 27 - Prob. 8WWTSCh. 27 - Male menopause is the cessation of sperm...Ch. 27 - Prob. 10WWTSCh. 27 - Prob. 1TYCCh. 27 - Prob. 2TYCCh. 27 - Prob. 3TYCCh. 27 - Why is it possible for spermatogonia to be outside...Ch. 27 - A 68-year-old man taking medication for...
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- One of the earliest events that distinguishes meiosis occurs in prophase I and involves: Question 14 options: Condensation of chromosomes Loss of the nuclear membrane Movement of chromosomes toward the metaphase plate Pairing of homologous chromosomesarrow_forwardThe result of spermatogenesis is: 4 viable haploid spermatids. 1 viable haploid spermatid and 3 haploid polar bodies. 4 viable diploid spermatids. 1 viable diploid spermatids and 3 diploid polar bodies.arrow_forwardNondisjunction in leads to the formation of gametes that are all aneuploid. meiosis I meiosis II both meiosis I and mitosis both meiosis I and meiosis IIarrow_forward
- After telophase II of meiosis, the chromosomal makeup of each daughter cell is: Practia diploid, and the chromosomes are each composed of a single chromatid. O diploid, and the chromosomes are each composed of two chromatids. O haploid, and the chromosomes are each composed of a single chromatid. O haploid, and the chromosomes are each composed of two chromatids.arrow_forwardAdvantage and disadvantage of crossing over of the paired chromosomes from each parent in meiosisarrow_forwardDescribe one function, brought about by the process of meiosis thatspermatogenesis and oogenesis have in common. Please write the similarities between spermatogenesis and oogenesis in a paragraph ratherthan a table. Please discuss the process mentioning differentiation, multiplication anddivision. How many stages of meiosis do they go through. Please mention if haploid ordiploid cells are formed.arrow_forward
- Meiosis involves two phases, meiosis I and meiosis II. This type of cell division occurs during the formation of both sperm and ovum. The first meiotic division of the primary spermatocyte results in two secondary spermatocytes. .What is the result of the first meiotic division of the primary oocyte? two secondary oocytes two polar bodies O two ovum one secondary oocyte and one polar bodyarrow_forwardmeiosis mitosis and meiosis mitosis 1. involves two successive nuclear and cell divisions 2. yields haploid daughter cells 3. results in production of four genetically different daughter cells 4. involves chromosome movement and distribution to daughter cells 5. preceded by replication of chromosomes during interphase 6. results in the production of gametes 7. involves pairing of homologous chromosomes and crossing-over 8. results in the production of two genetically identical daughter cellsarrow_forwardWhich stage of meiosis involves the separation of homologous pairs of chromosomes? anaphase II metaphase II prophase I anaphase I Gametic meiosis, where the haploid phase is unicellular and the diploid phase is multicellular, is characteristic of fungi animals bacteria plantsarrow_forward
- True or false after the first meiotic division the cells are haploid because they have only one chromosome of each original homologous pairarrow_forwardDuring meiotic divisions to make sperm, the cellular divisions at the end of meiosis I and II is unequal resulting in one gamete. True Falsearrow_forwardWhat separates during anaphase of Meiosis I? Pairs of sister chromatids from homologous pairs of sister chromatids (i.e. homologues separate) Sister chromatids separate from one another Nucleoids separate form one another The two strands of DNA separate from one anotherarrow_forward
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