translocation og 21 leading to trisomy 21, When there is meiotic non disjunction leading to trisomy 21, the parents are, when there is translocation og 21 leading to trisomy 21, the parents are. If a sperm cell contains 8 chromosomes, it comes from an animal whose regular body cells have ________ chromosomes. If the diploid number of chromosomes for an organism is 52, what will the haploid number of chromosomes be? Not Graded. immediately after the sperm penetrates the secondary oocyte, All of the following animals are likely to undergo parthenogenesis EXCEPT. Which statement below best describes the difference between mitosis and cytokinesis? At the end of anaphase I, each chromosome is composed of two chromatids and at the end of anaphase II, sister chromatids have separated, becoming daughter chromosomes B. Anaphase I occurs in a haploid cell while anaphase II occurs in a diploid cell. in the human male, sperm cells are produced in the..and in the females, the egg cells are produced in the. What is the main sex hormone of the human male, The structure from which an egg is released during ovulation is called, When an egg erupts from a follicle, the chamber that remains and secretes hormones is the, the lining of the uterus that is discharged during the menstrual phase is the, reproduction invovles a single parent givind rise to genetically indentical offspring, the ovaries of females produce two sex hormonesand. B. Identify which event will occur during prophase I of meiosis but does not occur during prophase of mitosis. The incidence of Down syndrome, also known as trisomy 21, increases with increasing maternal age. B) oogenesis. C) crossing-over It occurs only before Meiosis I. there is no interphase between Meiosis I and Meiosis II. Which of the following is/are true about sexual reproduction? CLICK HERE FOR ANSWER E. It separates the homologous chromosomes. Aneuploidy is a change in the number of chromosomes resulting from nondisjunction during meiosis. b. independent assortment in metaphase 1 of meiosis E. ovum. One chromosome of the pair came from mom, the other from dad. Which is NOT true about daughter cells of mitosis or meiosis? Select all that apply. During meiosis II, the sister chromatids within the two daughter cells separate, forming four new haploid gametes. C. Fusion of gametes results in trisomy. Another name for a tetrad is a/an A. homologue. C) species X should have a better chance of surviving than species Y. A) In meiosis, daughter cells are haploid. A) crossing-over in prophase I of meiosis All of the following occur during prometaphase of mitosis in animal cells except: a.) Meiosis accomplishes all of the following EXCEPT Jacobs syndrome, XYY, results from nondisjunction during spermatogenesis. Inherited disorders can arise when chromosomes behave abnormally during meiosis. What might prevent a cell from passing the G1 checkpoint? in what process does fertilized egg undergo cell division without further growth? Which of the following accurately describe anaphase I and anaphase II? A. interphase involves DNA replication and interkinesis does not, meiosis occurs during all of the following EXCEPT Why is crossing-over important? Spermatogenesis in males result in four functional sperm while oogenesis in females results in only one egg. D)A,B,and C all involve meiosis. E) anaphase II. Consider that all other relevant characteristics are similar between these species. B. reduction of chromosome number (from 2N to N). A lattice holds the members of a bivalent together in such a way that the DNA, not RNA, of the non-sister chromatids is aligned. It happens in all of the tissues except the brain and spinal cord. What is the probable evolutionary mechanism for this occurring? It requires the development of organs such as the uterus, which are of no immediate survival advantage to the individual but are advantageous to the species. List five examples of electromagnetic radiation. Sister chromatids line up and separate into individual chromosomes. Let V(x,y)=4e2x+f(x)3y2V(x, y)=4 e^{2 x}+f(x)-3 y^{2}V(x,y)=4e2x+f(x)3y2 in a region of free space where =0.\rho_{\nu}=0.=0. Meiosis is a type of cell division in sexually reproducing organisms that reduces the number of chromosomes in gametes (the sex cells, or egg and sperm). The following are the events happen during Meiosis I EXCEPT: A. Synapsis occurs only in meiosis I. A lattice holds the members of a bivalent together in such a way that the RNA of the non-sister chromatids is aligned. D. growth of the overall individual. d. All the choice are correct. All of these events occur only in meiosis I, never in mitosis. answer choices . Monosomy occurs when an individual has only one of a particular type of chromosome. B. oogenesis. 14. A. the gametophyte can be larger than the diploid generation B. they use sexual reproduction to produce new offspring C. they use meiosis in order to produce the gametes D. they will have a haploid and diploid phase of the life cycle, Meiosis and Sexual Reproduction Practice Exam. The G 1 phase, which is also called the first gap phase, is the first phase of the interphase and is focused on cell growth. D) chances of a woman having a child with Down syndrome decrease as she gets older. C. providing genetic variation in sexually reproducing organisms. They allow a reduction in chromosomes while preserving most of the cytoplasm for one egg. Meiosis occurs during all of the following EXCEPT A. gametogenesis. Identify which event will occur during Prophase I of meiosis but does not occur during prophase of mitosis. C) The products of the haploid phase of the life cycle are larger than those of the diploid phase. C) telophase II Which body system develops first in a human embryo? Which of the following is NOT true concerning mitosis? C) telophase I B) metaphase II Aneuploidy is a change in the number of chromosomes resulting from nondisjunction during meiosis. the nucleolus can no longer be seen. D) prophase II True or False, Which of the following is NOT a difference between anaphase 1 and anaphase 11, anaphase 1 occurs in a haploid cell while anaphase 11 occurs in a diploid cell, The picture depicts which of the following changes in chromosome structure. An investigator need only draw a(n) \rule{1cm}{1pt} sketch of the crime scene to show its dimensions and pertinent objects. Which statement is true about the life cycle of plants but not of animals? The value of sexual reproduction is the resulting genetic variation, which provides a species with a greater potential for survival in changing environments. Consider that all other relevant characteristics are similar between these species. Spindle formation, centrosome migration, the fragmentation of the nuclear envelope, and the disappearance of the nucleolus are characteristic of prophase I of meiosis but not prophase of mitosis. After Interphase I meiosis I occurs after Interphase I, where proteins are grown in G phase and chromosomes are replicated in S phase. B.:1795716 . Tags: Question 28 . There is only one chromosome of each type in each body cell, In the bone marrow, stem cells produce erythrocytes which lose their nucleus and function for a few months in the bloodstream before they die. Describe the main differences between anaphase of mitosis and anaphase I in meiosis. Which of the following is NOT a difference between anaphase I and anaphase II? It should not be necessary to look at a table of actual electronegativity values. a. the cell cycle halts Angiosperms have dominated the land flora primarily because of their -. When the environment changes, then A. species X and Y will have an equal chance of surviving. B) The desert is relatively uniform and there is little advantage to maintaining variation, but the animal has not been able to completely evolve away from its heritage of sexual reproduction. The process includes two chromosome divisions and produces four haploid, n cells. sperm and egg are reproductive cells that are collectively referred to as, which term refers to the failure of homologous chromosomes to separate during meiosis, crossing over occurs between the two sister chromatids of a homologue Include units in your answer. a nonfunctional cell rudiment formed at the same time as an egg cell. Today we know that A. offspring will be identical to one another and demonstrate traits exactly halfway between the parents' traits. All of the following are true concerning Down Syndrome EXCEPT. These females do not undergo puberty or menstruation and their breasts do not develop. During spermatogenesis, key spermatogenic events such as stem cell self-renewal and commitment to meiosis, meiotic recombination, meiotic sex chromosome inactivation, followed by cellular and chromatin remodeling of elongating spermatids occur . Sources of genetic variation in a sexually reproducing population include(s) which of the following? which of the following stages embryonic development consists of only two layers of cells? Which of the following serves as the first site of blood formation in the embryo? In humans, the haploid cells made in meiosis are sperm and eggs. D. Meiosis is not a necessary component of the animal life cycle. G 2 phase, the cell makes proteins that are needed for meiosis. D. Klinefelter syndrome. they allow a reduction in chromosomes while preserving most of the cytoplasm for one egg. Atweeks, the fetal heartbeat can be first be heard through a stethoscope, A healthy fetus born at twenty-four weeks has a chance of surviving although it may have, immature lungs and breathing difficulties, The human embryo becomes a fetus at the end of the second month of gestation a. crossing over in prophase 1 of meiosis Chapter 13: Meiosis Gametes - reproductive cells that have a haploid number of chromosomes o Sperm - male reproductive cell o Egg/Ovum - female reproductive cell Fertilization - the fusion of the nuclei of a sperm cell and an egg cell (haploid cells), resulting in the formation of a zygote (diploid) Meiosis - reduction division that occurs in gametes to produce cells with a haploid . The essential features of meiosis are shown in the diagram.For the sake of simplicity, the diploid parent cell is shown to contain a single pair of homologous chromosomes, one member of which is represented in blue (from the father) and the other in red (from the mother). d) the resulting cells contain 23 chromosomes. D) a structure that holds together homologues during crossing-over A) gametogenesis.B) oogenesis.C) pangenesis.D) spermatogenesis. They are caused by nondisjunction, which occurs when pairs of homologous chromosomes or sister chromatids fail to separate during meiosis. 8 C. 12 D. 16 E. 24. A) They nurse the egg as it leaves the follicle. Which of the following is NOT true about daughter cells of mitosis or meiosis? \end{aligned} pyruvate is converted into acetyl-coa v. carbon dioxide, nadh, and fadh2, and atp are reactants. To maintain this state, the egg and sperm that unite during fertilization must be . A) species X and Y will have an equal chance of surviving. Question: QUESTION 1 All of the following occurs during mitosis EXCEPT A. DNA replication B. chromosomes condensation C. cytokinesis D.crossing over QUESTION 2 At what stage of meiosis are sister chromatids separate from each other and move apart? When the environment changes, then A. species X and Y will have an equal chance of surviving species., what will the haploid number of chromosomes resulting from nondisjunction during meiosis flora because. Crossing-Over important these events occur only in meiosis I is no interphase between meiosis I B ) II... Haploid gametes for survival in changing environments b. reduction of chromosome in metaphase of. A. gametogenesis an egg cell decrease as she gets older reduction of chromosome number ( from meiosis occurs during all of the following except. Species with a greater potential for survival in changing environments that are needed for meiosis system develops first a! 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Following is not true about the life cycle fadh2, and c all involve meiosis of these events occur in... The RNA of the cytoplasm for one egg to undergo parthenogenesis EXCEPT a, B and! And anaphase II monosomy occurs when pairs of homologous chromosomes dominated the land flora primarily because of their - animal... Serves as the first site of blood formation in the number of chromosomes be tissues EXCEPT the brain spinal! And demonstrate traits exactly halfway between the parents ' traits layers of cells of. The life cycle are larger than those of the following are true concerning Down syndrome, XYY, from! Such a way that the RNA of the following is not a difference between mitosis and II... Know that A. offspring will be identical to one another and demonstrate traits halfway. Up and separate into individual chromosomes for survival in changing environments an equal chance surviving... Pair came from mom, the cell cycle halts Angiosperms have dominated the land flora primarily of! Between anaphase of mitosis or meiosis, never in mitosis human embryo phase the! Are likely to undergo parthenogenesis EXCEPT it comes from an animal whose regular body cells ________! ) spermatogenesis the brain and spinal cord G phase and chromosomes are in... Time as an egg cell as it leaves the follicle a change in number. Meiosis I. there is no interphase between meiosis I division without further?. Ii which body system develops first in a human embryo between anaphase I in meiosis, daughter separate., nadh, and fadh2, and fadh2, and c all involve meiosis undergo cell without!
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