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Results 1 - 10 of 29 for Chromosome
  1. What is a chromosome?: MedlinePlus Genetics 
    ... molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many ... around proteins called histones that support its structure. Chromosomes are not visible in the cell’s nucleus— ...
    https://medlineplus.gov/genetics/understanding/basics/chromosome - Genetics
  2. Can changes in the number of chromosomes affect health and development?: MedlinePlus Genetics 
    Human cells normally contain 23 pairs of chromosomes, for a total of 46 chromosomes in each cell . A change in the number of chromosomes can cause problems with growth, development, and ...
    https://medlineplus.gov/.../chromosomalconditions - Genetics
  3. Can changes in the structure of chromosomes affect health and development?: MedlinePlus Genetics 
    Changes that affect the structure of chromosomes can cause problems with growth, development, and function of the body's systems. These changes can affect many genes along the chromosome ...
    https://medlineplus.gov/.../mutationsanddisorders/structuralchanges - Genetics
  4. How many chromosomes do people have?: MedlinePlus Genetics 
    ... humans, each cell normally contains 23 pairs of chromosomes, for a total of 46. Twenty-two of ... males and females. The 23rd pair, the sex chromosomes, differ between males and females. Females have two ...
    https://medlineplus.gov/.../understanding/basics/howmanychromosomes - Genetics
  5. How do geneticists indicate the location of a gene?: MedlinePlus Genetics 
    ... the location of a particular gene on a chromosome. One type of map uses the cytogenetic location ... on a distinctive pattern of bands created when chromosomes are stained with certain chemicals. Another type of ...
    https://medlineplus.gov/.../understanding/howgeneswork/genelocation - Genetics
  6. What are the different types of genetic tests?: MedlinePlus Genetics 
    ... tests are available to analyze changes in genes, chromosomes, or proteins. A health care provider will consider ... a test that looks at many genes or chromosomes may be used. However, if a specific condition ...
    https://medlineplus.gov/genetics/understanding/testing/types - Genetics
  7. What is genetic testing?: MedlinePlus Genetics 
    ... of medical test that identifies changes in genes, chromosomes, or proteins. The results of a genetic test ... s DNA (which is known as their genome). Chromosomes : Chromosomal genetic tests analyze whole chromosomes or long ...
    https://medlineplus.gov/.../understanding/testing/genetictesting - Genetics
  8. Cells and DNA: MedlinePlus Genetics 
    ... DNA? What is a gene? What is a chromosome? How many chromosomes do people have? What is noncoding DNA? Learn ...
    https://medlineplus.gov/genetics/understanding/basics - Genetics
  9. What is a gene?: MedlinePlus Genetics 
    ... the gene name. For example, a gene on chromosome 7 that has been associated with cystic fibrosis ... CFTR . Genes are made up of DNA. Each chromosome contains many genes. Credit: U.S. National Library ...
    https://medlineplus.gov/genetics/understanding/basics/gene - Genetics
  10. What is noninvasive prenatal testing (NIPT) and what disorders can it screen for?: MedlinePlus Genetics 
    ... an extra or missing copy ( aneuploidy ) of a chromosome. NIPT primarily looks for Down syndrome (trisomy 21, caused by an extra chromosome 21 ), trisomy 18 (caused by an extra chromosome ...
    https://medlineplus.gov/genetics/understanding/testing/nipt - Genetics
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