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  2. Canine transmissible venereal tumor - Wikipedia

    en.wikipedia.org/wiki/Canine_transmissible...

    Dog cells normally have 78 chromosomes, while the cancer cells contain 57–64 chromosomes [9] that are very different in appearance from normal dog chromosomes. All dog chromosomes except X and Y are acrocentric, having a centromere very near to the end of the chromosome, while many of the CTVT chromosomes are metacentric or submetacentric ...

  3. Ring chromosome - Wikipedia

    en.wikipedia.org/wiki/Ring_chromosome

    Human genetic disorders can be caused by ring chromosome formation. Although ring chromosomes are very rare, they have been found in all human chromosomes. Symptoms seen in patients carrying ring chromosomes are more likely to be caused by the deletion of genes in the telomeric regions of affected chromosomes, rather than by the formation of a ring structure itself. [5]

  4. Cancer in dogs - Wikipedia

    en.wikipedia.org/wiki/Cancer_in_dogs

    A 10-year-old female beagle with oral cancer. Cancer is the leading cause of death in dogs. [1] It is estimated that 1 in 3 domestic dogs will develop cancer, which is the same incidence of cancer among humans. [2] Dogs can develop a variety of cancers and most are very similar to those found in humans.

  5. Chromosome 21 - Wikipedia

    en.wikipedia.org/wiki/Chromosome_21

    In some cases, the signs and symptoms are similar to those of Down syndrome. Changes to chromosome 21 include a missing segment of the chromosome in each cell (partial monosomy 21) and a circular structure called ring chromosome 21. A ring chromosome occurs when both ends of a broken chromosome are reunited.

  6. List of genetic disorders - Wikipedia

    en.wikipedia.org/wiki/List_of_genetic_disorders

    The following is a list of genetic disorders and if known, type of mutation and for the chromosome involved. Although the parlance "disease-causing gene" is common, it is the occurrence of an abnormality in the parents that causes the impairment to develop within the child. There are over 6,000 known genetic disorders in humans.

  7. Polysomy - Wikipedia

    en.wikipedia.org/wiki/Polysomy

    Trisomy 21 – Down syndrome, an example of a polysomy at chromosome 21 Polysomy is a condition found in many species, including fungi, plants, insects, and mammals, in which an organism has at least one more chromosome than normal, i.e., there may be three or more copies of the chromosome rather than the expected two copies. [1]

  8. Males lose sex chromosome as they age. It could make cancer ...

    www.aol.com/news/males-lose-sex-chromosome-age...

    Previous research has shown that Y chromosome loss is present in multiple types of cancers in males, including between 10 and 40 percent of bladder cancers, according to the release.

  9. Causes of cancer - Wikipedia

    en.wikipedia.org/wiki/Causes_of_cancer

    HPV is the most common virus that infects the reproductive tract. Infection can lead to the development of cervical cancer in women. Viral infection is a major risk factor for cervical and liver cancer. [61] A virus that can cause cancer is called an oncovirus.