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Going down to the cellular level, it occurs in meiosis when chromosomes fail to separate (nondisjuction). We get a set of chromosomes from our paternal side and the other set from out maternal side. For example, one of the gamete that may have came from our maternal side contains no chromosomes , O, when it should contain that chromosome x while from our paternal side we get a gamete containing the x chromosomes. This results in a XO, a sterile female when the normal sex chromosomes are XX or XY.
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nondisjunction
What else can I help you with?
Does turner syndrome occur in boys?
No, Turner syndrome affects girls.
At what age does turner's syndrome occur?
Turner's occurs in situ, usually very early in the development of the embryo.
What is the Effects of nondisjunction?
Nondisjunction can lead to abnormal chromosome numbers in daughter cells, resulting in conditions such as Down syndrome, Turner syndrome, or Klinefelter syndrome. This can cause developmental issues, intellectual disabilities, and various physical abnormalities in affected individuals.
What is the prevalence and clinical significance of monosomy X mosaicism in individuals with Turner syndrome?
Monosomy X mosaicism is a rare genetic condition where some cells in the body have only one X chromosome instead of the usual two. In individuals with Turner syndrome, this condition can occur and may have clinical significance. The prevalence of monosomy X mosaicism in Turner syndrome is not well established, but it can impact the severity and symptoms of the syndrome. It may lead to a more variable presentation of Turner syndrome, with some individuals experiencing more severe symptoms than others.
What causes disorders such as Klinefelter's syndrome and Turner syndrome?
Klinefelter's syndrome is caused by the presence of an extra X chromosome in males (XXY), typically resulting in developmental and hormonal differences. Turner syndrome is caused by the complete or partial absence of one of the X chromosomes in females (X0), leading to underdeveloped ovaries and infertility. Both conditions occur due to chromosomal abnormalities during conception.
What are the causes of genetic human disorders?
The causes of genetic disorders areThey can be inherited through Parents;Mutations may occur;A deletion may occur.These are the causes of a genetic disorder.
What age does Angelman Syndrome occur?
Angel-man syndrome's usual occurrence's is after birth and is sometimes genetic.
What are the similarities and differences between Down syndrome and Turner syndrome?
Down syndrome is caused by an extra or part of an extra 21st chromosome while Turner syndrome is caused by an absence in one or part of the sex(X) chromosome.Down syndrome can occur in both male and femalewhile Turner syndrome only occurs in female.People with Down syndrome tend to have a lower than average cognitive ability.Both Down syndrome and Turner syndrome are at higher risk for having medical conditions such as heart problems.
what is the risk of deformity or downs syndrome in brother and sister conceive a baby?
The risk of deformity or Down syndrome in a baby conceived by a brother and sister (consanguineous relationship) is higher compared to unrelated parents. This is due to the increased likelihood of sharing similar genetic mutations, which can increase the risk of genetic disorders. The risks include: Autosomal recessive disorders (e.g., cystic fibrosis, sickle cell anemia) Autosomal dominant disorders (e.g., achondroplasia, Huntington's disease) Chromosomal abnormalities (e.g., Down syndrome, Turner syndrome) Congenital anomalies (e.g., heart defects, cleft palate) The exact risk depends on the degree of consanguinity (how closely related the parents are) and the specific genetic disorders in the family. For first cousins (once removed), the risk of birth defects is around 4-6%. For full siblings (brother and sister), the risk is higher, around 10-15%. It's important to note that the majority of children born to consanguineous parents are healthy, and many genetic disorders can occur in unrelated parents as well. If you have concerns, consult a genetic counselor or a medical professional for personalized advice.
Can nondisjunction occur during mitosis?
Yes, nondisjunction can occur during mitosis. Nondisjunction is the failure of chromosomes to separate properly during cell division, leading to an abnormal distribution of chromosomes in the daughter cells. This can result in genetic disorders such as Down syndrome.
What is the population affected in turner's syndrome?
Turner syndrome affects approximately 1 in 2,500 live female births, making it one of the most common chromosomal disorders in females. The condition arises from a complete or partial loss of one of the X chromosomes, leading to various physical and developmental issues. While it predominantly affects females, it can also occur in individuals with atypical chromosomal patterns. The overall prevalence indicates that hundreds of thousands of women and girls worldwide are living with Turner syndrome.
Why did evolution not occur in down syndrome?
Down Syndrome is a the addition of an extra chromosome and not really related to evolution. It is more of a genetic mutation that causes this event to occur.
