• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Name - Humble ISD
Name - Humble ISD

... b. Individuals that are SS produce abnormal hemoglobin that causes the red blood cells to “sickle” when oxygen availability is decreased; i. for example, in high altitudes or during periods of stress. Sickled RBCs are more fragile, easily destroyed – results in lack of ____________ due to decreased ...
Mutations - Houston ISD
Mutations - Houston ISD

... inserted into sequence ...
The Hammond Lab is primarily interested in an epigenetic process
The Hammond Lab is primarily interested in an epigenetic process

... The Hammond Lab is primarily interested in an epigenetic process called meiotic silencing by unpaired DNA (MSUD) and a common phenomenon in fungi known as spore killing. We are also interested in viruses of fungi and fungi that infect plants. Most of our projects involve an organism called Neurospor ...
Heredity Power Point - Auburn School District
Heredity Power Point - Auburn School District

... G. Is there a cure for color blindness? Can it be prevented? ...
1. Review Questions Packet #1
1. Review Questions Packet #1

... Unit 8 – Evolution 1. The process by which new species develop from pre-existing species is known as _______________________. 2. TRUE / FALSE. There are always enough resources to support all organisms in an area. ...
doc Vocabulary tests year 2 See description for year 1.
doc Vocabulary tests year 2 See description for year 1.

... Genetic cross between parents that have different alleles for one particular gene ...
Chapter 2. The beginnings of Genomic Biology – Classical Genetics
Chapter 2. The beginnings of Genomic Biology – Classical Genetics

... shortness)—today known as alleles. For each characteristic, an individual possesses two paired alleles—one inherited from each parent. Correspondingly, these pairs segregate (i.e. separate or assort) in germ cells and recombine during reproduction so that each parent transmits one allele to each off ...
THT - TESD home
THT - TESD home

... A. Segments of DNA are crossing over. B. Sister chromatids are separating. C. Genes are replicating. D. Alleles are independently assorting. 16. Most heritable differences are due to A. gene shuffling that occurs during the production of gametes. B. the inability to form proper DNA sequences due to ...
Chapter 1 - FacultyWeb Support Center
Chapter 1 - FacultyWeb Support Center

... Would you want yourself or a loved one to be tested for a gene that increases your risk for a disease but does not determine whether you will actually develop the disease? Why or why not? Would you want yourself and your mate tested before having offspring to determine your risk for having a child w ...
Lab 3 Procedure
Lab 3 Procedure

... over and recombination that occurs during meiosis by examining the arrangements of ascospores in the asci from a cross between wild type and mutants for tan spore coat color in the fungus Sordaria fimicola. These arrangements will be used to estimate the percentage of crossing over that occurs betwe ...
Document
Document

... • Think of three things you inherited from your parents. • Think of three things you learned from your parents. • Think of how these interact • Can you tell them apart? • For example, both of your parents are outgoing and you are outgoing did they pass it to you through genetics, experience, or both ...
Exam 1 Q2 Review Sheet
Exam 1 Q2 Review Sheet

... and which are diploid? (We have two types of cells, the gametes = sex cells, and somatic cells = body cells. The prefix soma- means “body”.) 34. If a cell is 2n, is it haploid, diploid or triploid? Explain. 35. If the haploid number of an organism is 38 (n = 38), how many chromosomes would be in its ...
Biology EOC and Final Exam Vocabulary List Experimental Design
Biology EOC and Final Exam Vocabulary List Experimental Design

... frameshift mutation because every codon after it will be off by one letter. Deletions: A type of mutation in which a nucleotide (A,T,C,G) is deleted from the copied DNA strand. This is a frameshift mutation because every codon after it will be off by one letter. Substitutions: A type of mutation in ...
Genetics AIMS Review
Genetics AIMS Review

... D decreases the number of corn plants a farmer can grow in a season 28 How did the work of Gregor Mendel change the scientific explanation about how traits were inherited? A Mendel showed that every trait is controlled by two inherited elements. B Mendel showed that an organism contains miniature fo ...
Biology-studytargetsforsemesterII
Biology-studytargetsforsemesterII

... 1. I can summarize the major concepts of natural selection: Differential survival and reproduction Chance inheritance of variation Environment selects for specific traits Mutations are the raw material for change 2. I can describe how natural selection is a mechanism for evolution by explaining how ...
Macroevolution: Part III Sympatric Speciation
Macroevolution: Part III Sympatric Speciation

... • Allopatric speciation is the evolution of geographically isolated populations into distinct species. There is no gene flow, which tends to keep populations genetically similar. • Parapatric speciation is the evolution of geographically adjacent populations into distinct species. Divergence occurs ...
June-Biology-Final-2015
June-Biology-Final-2015

... 1. I can summarize the major concepts of natural selection: Differential survival and reproduction Chance inheritance of variation Environment selects for specific traits Mutations are the raw material for change 2. I can describe how natural selection is a mechanism for evolution by explaining how ...
Ch. 11 Introduction to Genetics
Ch. 11 Introduction to Genetics

... gametes  in males, these gametes are called sperm (plant sperm enclosed in pollen)  in female animals, usu. only 1 cell from meiosis becomes egg (other 3 form small cells called polar bodies)  in female plants, might make 4 eggs or 1 egg & 3 polar bodies ...
Macroevolution Part III Sympatric Speciation
Macroevolution Part III Sympatric Speciation

... • Allopatric speciation is the evolution of geographically isolated populations into distinct species. There is no gene flow, which tends to keep populations genetically similar. • Parapatric speciation is the evolution of geographically adjacent populations into distinct species. Divergence occurs ...
Macroevolution Part III Sympatric Speciation
Macroevolution Part III Sympatric Speciation

... • Allopatric speciation is the evolution of geographically isolated populations into distinct species. There is no gene flow, which tends to keep populations genetically similar. • Parapatric speciation is the evolution of geographically adjacent populations into distinct species. Divergence occurs ...
Mol Bio CH1 Sept 13
Mol Bio CH1 Sept 13

... -Could use the frequency of “recombinants” (broken linkage groups) to estimate the relative positions of genes on a chromosome ...
HUMAN CHROMOSOMES
HUMAN CHROMOSOMES

... compensation, as in male karyotypes there is only one X chromosome present, and in female - two. Thus the genotypic possibilities of male and female karyotype are equalized. It is important that this inactivation occurs randomly, so that in early embryonic life (after 16 days) different cells may ha ...
Advance Molecular Biology (LS6421, 1999)
Advance Molecular Biology (LS6421, 1999)

... (3). X-inactivation center (Xic) is a cis-acting locus that contains the information necessary to inactivate all copies of X chromosomes but one. (4). Xic has an element(s) for counting and the Xist gene for inactivation. (5). The Xist RNA coats the X chromosome from which it is synthesized. (6). Fo ...
Concepts of Biology - Amazon Simple Storage Service (S3)
Concepts of Biology - Amazon Simple Storage Service (S3)

... chromosomes, then the resulting cell contains two sets of chromosomes. The number of sets of chromosomes in a cell is called its ploidy level. Haploid cells contain one set of chromosomes. Cells containing two sets of chromosomes are called diploid. If the reproductive cycle is to continue, the dipl ...
bio 15 midterm exam 2 qa 141112
bio 15 midterm exam 2 qa 141112

... b. DNA c. Proteins d. Lipids e. Salt 3. Which is the correct term for compounds that do mix with water? a. phospholipids b. hydrophobic c. hydrophilic d. protein e. hydrogen bonded 4. Which of the following do nucleic acids and proteins have in common? a. They are both made of amino acids. b. Their ...
< 1 ... 308 309 310 311 312 313 314 315 316 ... 586 >

Polyploid



Polyploid cells and organisms are those containing more than two paired (homologous) sets of chromosomes. Most species whose cells have nuclei (Eukaryotes) are diploid, meaning they have two sets of chromosomes—one set inherited from each parent. However, polyploidy is found in some organisms and is especially common in plants. In addition, polyploidy occurs in some tissues of animals that are otherwise diploid, such as human muscle tissues. This is known as endopolyploidy. Species whose cells do not have nuclei, that is, Prokaryotes, may be polyploid organisms, as seen in the large bacterium Epulopicium fishelsoni [1]. Hence ploidy is defined with respect to a cell. Most eukaryotes have diploid somatic cells, but produce haploid gametes (eggs and sperm) by meiosis. A monoploid has only one set of chromosomes, and the term is usually only applied to cells or organisms that are normally diploid. Male bees and other Hymenoptera, for example, are monoploid. Unlike animals, plants and multicellular algae have life cycles with two alternating multicellular generations. The gametophyte generation is haploid, and produces gametes by mitosis, the sporophyte generation is diploid and produces spores by meiosis.Polyploidy refers to a numerical change in a whole set of chromosomes. Organisms in which a particular chromosome, or chromosome segment, is under- or overrepresented are said to be aneuploid (from the Greek words meaning ""not"", ""good"", and ""fold""). Therefore the distinction between aneuploidy and polyploidy is that aneuploidy refers to a numerical change in part of the chromosome set, whereas polyploidy refers to a numerical change in the whole set of chromosomes.Polyploidy may occur due to abnormal cell division, either during mitosis, or commonly during metaphase I in meiosis.Polyploidy occurs in some animals, such as goldfish, salmon, and salamanders, but is especially common among ferns and flowering plants (see Hibiscus rosa-sinensis), including both wild and cultivated species. Wheat, for example, after millennia of hybridization and modification by humans, has strains that are diploid (two sets of chromosomes), tetraploid (four sets of chromosomes) with the common name of durum or macaroni wheat, and hexaploid (six sets of chromosomes) with the common name of bread wheat. Many agriculturally important plants of the genus Brassica are also tetraploids.Polyploidy can be induced in plants and cell cultures by some chemicals: the best known is colchicine, which can result in chromosome doubling, though its use may have other less obvious consequences as well. Oryzalin will also double the existing chromosome content.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report