You are studying a new species of insect. You identify the following about sex determination in this species: . Their cells contain chromosomes, but no sex chromosomes • Individuals who produce sperm have half the number of chromosomes than individuals who produce eggs Changes in the environment do not affect sex determination Given this information, you predict that this species uses sex determination. ● O XX/XO O parthenogenesis O non-chromosomal O haplo-diploid

You are studying a new species of insect. You identify the following about sex determination in this species: . Their cells contain chromosomes, but no sex chromosomes • Individuals who produce sperm have half the number of chromosomes than individuals who produce eggs Changes in the environment do not affect sex determination Given this information, you predict that this species uses sex determination. ● O XX/XO O parthenogenesis O non-chromosomal O haplo-diploid

Name: You are studying a new species of insect. You identify the following
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Description: You are studying a new species of insect. You identify the following about sex determination in thisspecies:. Their cells contain chromosomes, but no sex chromosomes• Individuals who produce sperm have half the number of chromosomes than individuals

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter20: The Reproductive System

Section: Chapter Questions

Problem 11RE

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Which of these are true statements about meiosis? Select all that apply O It results in cells that are genetically identical to the original cell It results in cells that are genetically different from each other and the original cell O It produces cells needed for sexual reproduction O It is the process by which multicellular organisms grow and develop O It produces cells with half as many chromosomes as the original cell
About sexual reproduction: Involves one parent where a new individual develops being an exact copy of the parent also known as clone and no gamete or reproductive organ is involved O Only the mother contributes with the oocyte or egg where a new individual is formed with an exact copy of the mother's genes O Involves two parents, where each parent contributes with special germ cells or gametes that once united in fertilization, a new individual develops receiving genetic material from both parents and the product of gene recombination O Involves the father only which contributes with special germ cells or spermatozoa that once fertilized, a new individual develops receiving genetic material from the father and the product of gene recombination Next » « Previous
Which of the following is NOT correct about oogenesis? * O the oocyte undergoes meiosis to produce one egg cell and three polar bodies O the oocyte undergoes mitosis to produce female gametes ) it occurs only in females diploid cell undergoes meiosis to produce four haploid cells it includes asymmetric division during gametes formation OO OO
Which of the following is a true statement about gametes? * O have diploid number of chromosomes have two sets of chromosomes () in human they contain 22 autosomal chromosomes and one sex chromosome in human they contain 22 pair of autosomal chromosomes and one pair of sex chromosomes Oare body cells come from mitosis of parent cells. O O O
Which of the following is NOT correct about meiosis? * O genetic exchange occurs during meiosis I only O during metaphase I, tetrads align up in the cell's midplane kind of asexual reproduction in unicellular organisms diploid cell produces four haploid cells occurs in the gonads (Testis or ovaries) to produce gametes
Adams maternal and paternal chromosomes have alternate forms of a gene that influences whether a person is right-handed or left-handed. One form says right and its partner says left. Visualize one of Adams spermatogonia, in which chromosomes are being duplicated prior to meiosis. Visualize what happens to the chromosomes during anaphase I and II. (It might help to use toothpicks as models of the sister chromatids of each chromosome.) What fraction of Adam's sperm will carry the gene for right-handedness? For left-handedness?
BPA and Abnormal Meiosis In 1998, researchers at Case Western University were studying meiosis in mouse oocytes (germ cells) when they saw an unexpected and dramatic increase of abnormal events (FIGURE 12.6). Improper segregation of chromosomes during meiosis is one of the main causes or human genetic disorders. The spike in abnormal meiosis began right after the mouse facility started washing the animals' plastic cages and water bottles in a new, alkaline detergent. The detergent had damaged the plastic, which as a result was leaching bisphenol A (BPA). BPA is a synthetic chemical that mimics estrogen, the main female sex hormone in animals. Though it has since been banned for use in baby bottles, BPA is still widely used to manufacture other plastic items and epoxies (such as the coating on the inside of metal cans of food). BPA-free plastics are often manufactured with a related compound, bisphenol S (BPS), that has effects similar to BPA. FIGURE 12.6 Abnormalities in meiosis that occurred after exposure to BPA. Top, the most abnormal meiosis events occurred in mice that were housed in damaged plastic caging with damaged plastic bottles. Damaged plastic releases BPA. Bottom, fluorescent micrographs show the chromosomes (red) and spindle (green) in nuclei of mouse germ cells in metaphase I. A Normal metaphase; BD abnormal metaphase. Which group of mice had the most meiotic abnormalities in their oocytes?
BPA and Abnormal Meiosis In 1998, researchers at Case Western University were studying meiosis in mouse oocytes (germ cells) when they saw an unexpected and dramatic increase of abnormal events (FIGURE 12.6). Improper segregation of chromosomes during meiosis is one of the main causes or human genetic disorders. The spike in abnormal meiosis began right after the mouse facility started washing the animals' plastic cages and water bottles in a new, alkaline detergent. The detergent had damaged the plastic, which as a result was leaching bisphenol A (BPA). BPA is a synthetic chemical that mimics estrogen, the main female sex hormone in animals. Though it has since been banned for use in baby bottles, BPA is still widely used to manufacture other plastic items and epoxies (such as the coating on the inside of metal cans of food). BPA-free plastics are often manufactured with a related compound, bisphenol S (BPS), that has effects similar to BPA. FIGURE 12.6 Abnormalities in meiosis that occurred after exposure to BPA. Top, the most abnormal meiosis events occurred in mice that were housed in damaged plastic caging with damaged plastic bottles. Damaged plastic releases BPA. Bottom, fluorescent micrographs show the chromosomes (red) and spindle (green) in nuclei of mouse germ cells in metaphase I. A Normal metaphase; BD abnormal metaphase. What is abnormal about metaphase I as it is occurring in the oocytes shown in FIGURE 12.6B, C, and D?
In ZZ-ZW sex determining systems which of the following is true? Insects such as bees, wasps, and ants use the ZZ-ZW sex determining system. The female is homogametic, while the male is heterogametic. After meiosis in the Female, half the eggs will have the Z chromosome. O The males develop from unfertilized eggs while the females develop from fertilized eggs. The SRY gene is found on the Z chromosome.
Parthenogenesis only occurs in Animals with separate sexes that produce egg and sperm, but how is it exactly like asexual reproduction? Choose all that apply. O Production of offspring does not involve the fusion of gametes Only one individual contributes genetic material to the offspring Gametes are produced by opposite sexes Fertilization is required for offspring to develop Gametogenic cells always complete meiosis to produce haploid gametes
Which one of the following is a result of fertilization Restoration of the haploid number of chromosomes O Restoration of the diploid number of chromosomes the resulting zygote has triple number of gamete (ovum or sperm) The resulting zygote has indefinite number of chromosomes
Gender is someone’s conscious and unconscious feelings ofbelonging to one sex or another. Each year, about 1 in 4500children are born with a disorder involving sexual development,where the chromosomal, gonadal, or anatomical sex isatypical. Here we will consider two similar cases with different outcomes.In case 1, a 2-year-old child displayed a mosaic chromosomecomposition of 45,X/46,XY, with one ovary, one testis, a uterus, andambiguous genitalia. In case 2, a fetus was diagnosed with a mosaicchromosome composition of 46,XX/47,XXY, and after birth, also displayedone testis, one ovary, a uterus, and ambiguous genitalia. Thechild in case 1 was adopted from an orphanage and raised as a girl.After consultation with the medical team, the parents decided tocontinue raising the child as a girl and requested surgery that wouldassign the child female sex characteristics. In case 2, the parentsdecided to forego treatment and let the child make the choice aboutgender later in life and to remain…