Abnormal numbers of sex chromosomes in Independence

Accepted : 22 November Bio 2. Endocrinology 10 —

This may be connected to low testosterone production. Sex determination and differentiation. XYY syndrome is also referred to as Jacobs syndrome. When the haploid male and female gametes unite in a process called fertilizationthey form what is called a zygote.

Polyploidization can occur before and after the development of sex chromsomes.

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Thus, the basis for chromosome theory, and the field of cytogeneticswas created. Neuron 43 3 — Endocrinology —

  • About 1 in male and 1 in female live births demonstrate some form of sex chromosome abnormality, although the symptoms of these conditions are generally much less severe than are those associated with autosomal abnormalities. Turner syndrome is a condition of females who, in the classic form, carry only a single X chromosome 45,X.
  • A sex chromosome , also referred to as an allosome , heterotypical chromosome , or heterochromosome , [1] [2] or idiochromosome [3] is a chromosome that differs from an ordinary autosome in form, size, and behavior. The human sex chromosomes, a typical pair of mammal allosomes, determine the sex of an individual created in sexual reproduction.
  • Humans are born with 46 chromosomes in 23 pairs. Most women are 46XX and most men are 46XY.
  • Sex chromosome aneuploidies individuals with abnormal numbers of sex chromosomes are found not infrequently in the general population and have characteristic deficits of cognitive ability: Individuals with an extra X chromosome XXY or Klinefelter's syndrome, and XXX syndrome have delays in the acquisition of language, as also do individuals with XYY syndrome.
  • Sex chromosome abnormalities occur as a result of chromosome mutations brought on by mutagens like radiation or problems that occur during meiosis. One type of mutation is caused by chromosome breakage.
  • Sex chromosome , either of a pair of chromosomes that determine whether an individual is male or female. The sex chromosomes of human beings and other mammals are designated by scientists as X and Y.

Received : 26 June Trends Genet 17 12 — Endocr Rev 20 3 — References and Recommended Reading Benson, K.

Abnormal numbers of sex chromosomes in Independence

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