• Study Resource
  • Explore Categories
    • 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
ch # 11 review questions
ch # 11 review questions

... recall an example they have studied in which colors blended and identify the inheritance pattern. (incomplete dominance) Lead students to hypothesize that incomplete dominance could have led to the green color of the parents. To test this idea, have students assume each parent has two dominant allel ...
GENETICS TEST II - Daytona State College
GENETICS TEST II - Daytona State College

... • When polyploidy originates by the combination of chromosome sets from different species as consequence of interspecific matings. • Allopolyploid – polyploid condition formed by the union of two or more distinct chromosome sets with a subsequent doubling of chromosome number. ...
www.XtremePapers.com
www.XtremePapers.com

... There are forty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C, and D. Choose the one you consider correct and record your choice in soft pencil on the separate answer sheet. Read the instructions on the answer sheet very carefully. Each corr ...
MICROBIAL GENETICS
MICROBIAL GENETICS

... IONIZING: Gamma and X-rays NON-IONIZING: UV light (sun tanning) ...
AP Bio Lab - Mitosis and Meiosis
AP Bio Lab - Mitosis and Meiosis

... by the process of cell division, which involves both division of the cell’s nucleus (karyokinesis) and division of the cytoplasm (cytokinesis). There are two types of nuclear division: mitosis and meiosis. Mitosis typically results in new somatic (body) cells. Formation of an adult organism from a f ...
Preformationism and epigenesis
Preformationism and epigenesis

Quiz name: Biological Diversity Topic 3
Quiz name: Biological Diversity Topic 3

... During sexual reproduction, the sperm unites with the egg in the process of fertilization. What is created by the joining of these two cells? ...
Complete the following chart using your genetic code chart worksheet:
Complete the following chart using your genetic code chart worksheet:

... 3. A mutation in which a single base is added or deleted from DNA is called a. A frameshift mutation b. A point mutation c. Translocation d. Nondisjunction 4. When part of one chromosome breaks off and is added to a different chromosome, the result is a. Translocation b. Insertion c. Inversion d. De ...
Blood Type and Sex Linked Inheritance
Blood Type and Sex Linked Inheritance

... •What if baby is Rh (+)? • Doctor can give Mom a shot (Rhogam, at about 28 weeks) that removes or hides R(+) cells from Mom’s bloodstream ...
Pedigree link
Pedigree link

... Mutant DNA ...
questionsCh12.doc
questionsCh12.doc

... b. a chart that can help you keep track of the alleles during genetic crosses c. named after an Augustinian monk in Brno, Moravia (currently part of the Czech Republic) 5. If a gene has alleles that are incompletely dominant, an individual that is heterozygous at this locus will have characteristics ...
Virginia`s spawnless oyster: traditionally bred, not genetically
Virginia`s spawnless oyster: traditionally bred, not genetically

... splicing. In short, recombinant DNA methods are not traditional methods of breeding. Although the oyster that the aquaculture industry uses is decidedly not wild, all of the changes it has undergone during domestication for aqua farming are time honored and traditional agricultural methods. One of t ...
Genetic Principles
Genetic Principles

... must be present to observe the phenotype • Autosomal dominant and sex-linked mutations are easier to study in diploid organisms. • Prior to the use of mutagens, spontaneously arisen mutations were used in genetic studies. ...
CST Review
CST Review

... 45. The gene for color vision (C) is dominant to the gene for color blindness (c) and is located on the X chromosome. If a color blind man and a woman with homozygous normal color vision have children, what are the chances that they will have a colorblind child? 46. Why do some lethal (deadly) allel ...
Genetic explanation of Schizophrenia
Genetic explanation of Schizophrenia

...  Potentially there may be subsets of schizophrenia, where specific symptoms are triggered by different gene abnormalities  the deletion of a specific region of chromosome 22, containing around 30-40 genes, causes a syndrome known as DiGeorge  as many as 1 in 4 people with DiGeorge develop schizop ...
Genetics - westmiddle6b
Genetics - westmiddle6b

... The offspring of organisms often grow up to look like one or both of their parents. This is because offspring inherit information from their parents that directs their development. The inherited information is located in the _____________ of every cell in the organism. The information is coded in th ...
Basic Aquaculture Genetics
Basic Aquaculture Genetics

... only one set of each chromosome pair. The process of creating haploid gametes is critical to reproduction in diploid organisms. When an egg (N) is fertilized by the sperm (N), the correct number of chromosomes (2N) is recovered in the zygote. The process of sperm or egg (gamete) generation is called ...
Ch.12 - Jamestown Public Schools
Ch.12 - Jamestown Public Schools

... nucleus, in the form of a # of chromosomes  The chromosome # varies from 1 species to another ...
Ch. 13 Genetic Engineering
Ch. 13 Genetic Engineering

... Producing New Kinds of Bacteria and Plants ...
HSLS3-3 - North Bergen School District
HSLS3-3 - North Bergen School District

... formation of eggs or sperm. Therefore, the traits determined by these two genes are inherited independently. For example, the wing gene and the horn gene are located on different chromosomes so they are inherited independently. Genes on different chromosomes are inherited independently of each other ...
6. MENDELIAN GENETICS. LINKAGE AND GENETIC MAPS.
6. MENDELIAN GENETICS. LINKAGE AND GENETIC MAPS.

... Traits and genetic disorders linked to autosomes There are several traits that follow the dominant-recessive mode of inheritance. For example, brown eyes are dominant to blue, woolly hair is dominant to straight. Inheritance of several human genetic disorders follows the pattern described for the T ...
Document
Document

... • Resulting from meiosis and random fertilization, new combinations of traits (different than those found in the parents) can be seen in offspring • Parental types: progeny (offspring) that have the same phenotype as one or both of the parents • Recombinants: progeny whose phenotypes differ from eit ...
Enhancing and Evolving to “Perfection”? Unit Study Guid e PART I
Enhancing and Evolving to “Perfection”? Unit Study Guid e PART I

... 5. Interpreting graphs and figures: A small community that is heavily infested with mosquitoes was sprayed weekly with the insecticide DDT for several months. Daily counts providing information on mosquito population size are represented in the graph below. How might you explain the observation tha ...
Meiosis and Sexual Reproduction
Meiosis and Sexual Reproduction

Mendel`s Principles
Mendel`s Principles

... Activity A: The Chromosomal Basis of Segregation Diploid cells contain two sets of homologous chromosomes. One set, or one member of each pair, comes from each parent. Each pair of homologous chromosomes carries genes that govern the same traits. For example, in pea plants, flower color is determine ...
< 1 ... 186 187 188 189 190 191 192 193 194 ... 538 >

Chromosome



A chromosome (chromo- + -some) is a packaged and organized structure containing most of the DNA of a living organism. It is not usually found on its own, but rather is complexed with many structural proteins called histones as well as associated transcription (copying of genetic sequences) factors and several other macromolecules. Two ""sister"" chromatids (half a chromosome) join together at a protein junction called a centromere. Chromosomes are normally visible under a light microscope only when the cell is undergoing mitosis. Even then, the full chromosome containing both joined sister chromatids becomes visible only during a sequence of mitosis known as metaphase (when chromosomes align together, attached to the mitotic spindle and prepare to divide). This DNA and its associated proteins and macromolecules is collectively known as chromatin, which is further packaged along with its associated molecules into a discrete structure called a nucleosome. Chromatin is present in most cells, with a few exceptions - erythrocytes for example. Occurring only in the nucleus of eukaryotic cells, chromatin composes the vast majority of all DNA, except for a small amount inherited maternally which is found in mitochondria. In prokaryotic cells, chromatin occurs free-floating in cytoplasm, as these cells lack organelles and a defined nucleus. The main information-carrying macromolecule is a single piece of coiled double-stranded DNA, containing many genes, regulatory elements and other noncoding DNA. The DNA-bound macromolecules are proteins, which serve to package the DNA and control its functions. Chromosomes vary widely between different organisms. Some species such as certain bacteria also contain plasmids or other extrachromosomal DNA. These are circular structures in the cytoplasm which contain cellular DNA and play a role in horizontal gene transfer.Compaction of the duplicated chromosomes during cell division (mitosis or meiosis) results either in a four-arm structure (pictured to the right) if the centromere is located in the middle of the chromosome or a two-arm structure if the centromere is located near one of the ends. Chromosomal recombination during meiosis and subsequent sexual reproduction plays a vital role in genetic diversity. If these structures are manipulated incorrectly, through processes known as chromosomal instability and translocation, the cell may undergo mitotic catastrophe and die, or it may unexpectedly evade apoptosis leading to the progression of cancer.In prokaryotes (see nucleoids) and viruses, the DNA is often densely packed and organized. In the case of archaea by homologs to eukaryotic histones, in the case of bacteria by histone-like proteins. Small circular genomes called plasmids are often found in bacteria and also in mitochondria and chloroplasts, reflecting their bacterial origins.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report