If the diploid number of chromosomes for an organism is 52, what will the haploid number of chromosomes be? Meiosis occurs during all of the following EXCEPT A. gametogenesis. C) fertilization 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 . Which of the following is/are true about sexual reproduction? What distinguishes paracentric inversions from pericentric inversions? A lattice holds the members of a bivalent together in such a way that the RNA of the non-sister chromatids is aligned. No fertilization can occur, and the eggs develop into female lizards. When the environment changes, then E) penis. B) The gametes are the diploid phase of the life cycle. Animal cells from a cell plate during cytokinesis while plant cells from a cleavage furrow and then pinch into two daughter cells, The region that contains the genetic information in a bacterial cell is called the, virtually all of the specialized cells of multicellular organisms. Neither A B. One main reason would be. B) It increases the likelihood that daughter cells contain different genetic material. During which stage of meiosis does crossing-over occur? G1 phase: The period prior to the synthesis of DNA. (2) Nature of self pollination. It occurs only before Meiosis I. there is no interphase between Meiosis I and Meiosis II. D. Trisomic and aneuploid. the cells produced at the end of meiosis are genetically identical to the parent cell. During _______________ the homologous chromosome pairs separate in a random fashion leading to genetic diversity among the offspring. Sex chromosome aneuploids are better tolerated and have a better chance of producing survivors. Tags: Question 28 . Today we know that. A. bivalents will form B. nuclear envelope will dissolve C. centrioles will form in animal cells D. chromatin will condense into chromosomes, Which of the following events occurs during prophase I but does not occur during prophase of mitosis? (a). Meiosis I DNA replication precedes the start of meiosis I. Prophase I. b. independent assortment in metaphase 1 of meiosis B) species Y should have a better chance of surviving than species X. Sources of genetic variation in a sexually reproducing population include(s) which of the following? during which stage of meiosis does homologue separation occur? D. C. Crossovers between non-sister chromosomal haploids of homologous chromosomes occur during the . They allow a reduction in chromosomes while preserving most of the cytoplasm for one egg. 14. A. the centrioles move toward opposite poles. The third way that meiosis generates genetic diversity is through the separation of homologous chromosomes into the gametes. What phenotype would be expected in balanced translocation heterozygotes in the absence of position effects? the nucleolus can no longer be seen. B. In humans, the haploid cells made in meiosis are sperm and eggs. It could be said that males are able to provide gametes with more genetic diversity than females for reproduction. E) telophase I, During which stage of meiosis do the homologous chromosomes separate? B. Interkinesis is the stage that precedes a prophase stage. It is estimated that an average of two or three cross-overs occur per human chromosome. 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. Select all that apply. Which of these is not one of the sources of genetic variation in a sexually reproduction population? Identify which event will occur during Prophase I of meiosis but does not occur during prophase of mitosis. e.) the spindle is or have the same amount of DNA and the same number of chromosomes as all other cells of the organism and develop from the same basic stem cells. Which of the following events occurs during prophase I 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. True or False, During the formation of an embryo, the hollow ball of cells having a fluid-filled cavity is called a, Gastrulation leads to formation of the tissue stage of development called, The opening that leads to the archenteron of an embryo is called, Theis the solid ball of cells that develop as a result of cleavage, David N. Shier, Jackie L. Butler, Ricki Lewis, Charles Welsh, Cynthia Prentice-Craver, David Shier, Jackie Butler, Ricki Lewis. True or False, Jacobs Syndrome, XYY, results from nondisjunction during spermatogenesis. Q. Which of the following normally results from meiosis in a human cell that contains 46 chromosomes? A change in the chromosome number resulting from nondisjunction is called euploidy. A. All of the following events occur during normal meiosis except _______. answer choices. Which of the following statements is true about the life cycle of animals? the daughter cells have only half the chromosomes of the parent cell. can be programmed and is essential to normal development. Which stage is most associated with a cell that is unable to divide again such as a muscle or nerve cell? B. oogenesis. No fertilization can occur, and the eggs develop into female lizards. Why do polar bodies form? When a sperm and an egg join in fertilization, the two haploid sets of chromosomes form a complete diploid set: a new genome. Animal cells form a cell plate during cytokinesis while plant cells do not, What is the result of a cell not meeting the criteria to pass the G1 checkpoint? Which statement below best describes the difference between mitosis and cytokinesis? B. Triploid and aneuploid d. All the choice are correct. Which stage of the cell cycle focuses on cell growth, replication of organelles and the accumulation of material for synthesizing DNA? Which of the following is a true statement concerning meiosis in males and females? Cytokinesis does not follow "endomitosis" that results in a tetraploid cell. Nondisjunction: Meiosis is the fundamental process that is behind sexual reproduction with the formation of offspring that are genetically unique from each other and ever from their parents.. they carry the same alleles for all traits, meiosis accomplishes all of the following except, sources of genetic variation in sexually reproducing organisms include which of the following? Mitosis is the process by which most cells in the body divide, involves a single round of cell division, and produces two identical, diploid daughter cells. Meiosis accomplishes all of the following EXCEPT C. It regularly produces a wider array of adaptations to the external environment in a shorter period of time. A) gametogenesis. (3) Domestication by man. To what does the term chiasma refer? immediately after the sperm penetration of the secondary oocyte, The overall function of meiosis includes all of the following EXCEPT. 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? C) The mating behavior probably evolved accidentally. 2. E. there is one chance in 23 of getting identical sets of chromosomes from one parent, times two because there are two parents; therefore, two siblings out of every 46 are really identical except for crossing-over. a. gametogenesis All of the following are true for meiosis EXCEPT *. B) in 23% of cases, the sperm contributes the extra chromosome. Is designed to receive only sperm from the same species. b) homologous pairs separate during meiosis I. c) one cell produces four cells. C) During prophase II of meiosis, the homologous chromosomes cross-over; there is no crossing-over during prophase of mitosis. C. 22. the primitive streak occurs in the morula stage of the embryonic development. E. Homologues interact with the spindle as if they were one chromosome. Prior to each mitotic division, a copy of every . Following this, four phases occur. Meiosis I. Meiosis is preceded by an interphase consisting of the G 1, S, and G 2 phases, which are nearly identical to the phases preceding mitosis. Monosomy occurs when an individual has only one of a particular type of chromosome. Spermatogenesis is the process of generation of male reproductive cells from spermatogonial stem cells in the seminiferous epithelium of the testis. Aneuploidy is a change in the number of chromosomes resulting from nondisjunction during meiosis. After penetration of the sperm in the zona, the zona reaction occurs, making the zone impermeable to other sperm. There is no such reduction in ploidy level in mitosis. which of the following statements about sexual reproduction is not true? At which stage of meiosis is each chromosome composed of a single chromatid? The ovaries, oviducts, and uterus are very small and underdeveloped. Another name for a tetrad is a/an A. homologue. The function does not include growth of the individual. Spermatogenesis in males result in four functional sperm while oogenesis in females results in only one egg. usually an exchange of material between nonhomologous chromosomes. In human females, when is meiosis II completed? Extra copies of sex chromosomes are more easily tolerated in humans than extra copies of autosomes. D. spermatogenesis. During which stage of meiosis does the homologue separation occur? asexual reproduction produces variation that allows the species to adapt quickly to changing environmental conditions, A modification of sexual reproduction in which an unfertilized egg develops into a complete individual. &\frac{d x_1}{d t}=r_1 x_1\left(1-\frac{x_1}{k_1}-b_1 \frac{x_2}{k_1}\right) \\ D) This is probably an asexual organism attempting to mimic sexual reproduction. 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. The genus Lacerta is composed of a species of lizards that are female and do not mate. A. (b) Depression. It occurs only in cells in the reproductive structures of organisms. In metaphase individual chromosomes (pairs of chromatids) line up along the equator; During anaphase the sister chromatids are separated to opposite poles Gastrulation is the first major process that occurs during prenatal development. D) Interkinesis can be variable in length. C) They carry genes for the same traits. (1) Property of producing large number of seeds. a. the chromosome copies attach to the plasma membrane and are pulled apart by cell growth which monosomy is the one that survives to term? e. none of the choices are sources of genetic variation, d. all of the choices are sources of genetic variation. Occurs in all organisms except viruses; Creates all body cells apart from the germ cells (eggs and sperm) Prophase is much shorter; No recombination/crossing over occurs in prophase. c. Based on your sketch in part b, what do you expect the populations of the two species to do in the long run? Which of the following is a true statement concerning meiosis in males and females? B) metaphase II The gametes are the haploid phase of the animals life cycle. They may carry different alleles for a trait. Match the following group of organisms with their respective distinctive characteristics and select the correct option : Down syndrome, Which of the following conditions results from a Robertsonian translocation? Which is NOT true about daughter cells of mitosis or meiosis? The gametes are the diploid phase of the life cycle. For this reason, meiosis I is referred to as a reduction division. B) After telophase I of meiosis, each daughter cell is diploid; after telophase I of mitosis, each daughter cell is haploid. Which statement is not true about homologous chromosomes in meiosis 1? Homologous chromosomes are similar in all of these characteristics EXCEPT. D) All of the choices are true. which trisomies are the ones that survives to term? offspring inherit essentially 50% of their genes from each parent, but two sibling offspring may share with each other from zero to 23 chromosomes in common from each parent, and further variation may occur due to crossing-over. b. Each homologue's centromere splits to form two chromosomes. Consider that all other relevant characteristics are similar between these species. C) 112 Which statement is NOT true about homologues in meiosis 1, Each homologues centromere splits to form two chromosomes, homologus chromosomes align on the equator during which phase, The cell formed through fertilization of an egg by a sperm is called a. Males provide more genes in sperm than females provide in eggs. E)Neither A,B,or C.All of the above involve mitosis. C)spermatogenesis. pangenesis. B) oogenesis. 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