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Yes, a Barr body can be present in Klinefelter syndrome, which is characterized by the presence of one or more extra X chromosomes in males (typically 47,XXY). In this condition, one of the X chromosomes becomes inactivated and forms a Barr body, similar to the process in typical females. However, the presence and number of Barr bodies can vary depending on the number of X chromosomes present.
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Do people with Klinefelter's syndrome have an inactivated X chromosome or a bar body?
People with Klinefert´s syndrome have one barr body. Yes , the number of barr bodies in a cell is always equal to the number of X chromosomes minus one. For example in the XXY chromosome there is one Barr body
What are some traits of Klinefelter's syndrome?
reduced muscle mass, reduced body and facial hair, and enlarged breast tissue. The effects of Klinefelter syndrome
A tall sexually underdeveloped human male has cells with one Barr body each what sex chromosome would you expect to see in a karyotype fro this individual?
XXY. This is Klinefelter syndrome, where males are often tall, sexually underdeveloped, and may have a slight mental disability. Source: BSCS Biology: A Molecular Approach, Blue Version Ninth Edition pg 364
Is Barr body present in female with Down syndrome?
Yes, a female with Down syndrome has three copies of chromosome 21, but only two copies of the X chromosome. Regarding sex chromosomes, she is genetically normal. For this reason X chromosome inactivation would occur, and she would have one Barr body per cell.
What occurs when a male inherits a extra x chromosome?
They get Klinefelter syndrome. They have male sex organs, but the testes are abnormally small and the man is sterile. Even though the extra X is inactivated, some breast enlargement and other female body characteristics are common.
Why do you do buccal smear testing for barr bodies?
Buccal smear testing for Barr bodies is performed to determine the presence of an extra X chromosome in females, which indicates a condition such as Turner syndrome or Klinefelter syndrome in males. This test is a non-invasive method that allows for the visualization of the Barr body, which is the inactivated X chromosome, by collecting cells from the inside of the cheek. It is useful in clinical genetics for diagnosing chromosomal abnormalities and understanding sex chromosome disorders. Additionally, it can be a helpful tool in prenatal diagnosis and research on sex differentiation.
How many barr bodies are found in an extra y chromosome?
Barr bodies are inactivated X chromosomes found in females, and males typically do not have Barr bodies since they have one X and one Y chromosome. In the case of an individual with an extra Y chromosome (for example, XYY syndrome), there are no Barr bodies present, as Barr bodies are formed from X chromosomes only. Therefore, the presence of an extra Y chromosome does not contribute to Barr body formation.
An individual with Turner syndrome appears male and has 1 Barr body?
A person with Turner syndrome typically has female characteristics, but may have some physical features mirroring male traits, such as a broad chest or a low hairline. The presence of one Barr body in their cells is normal, as individuals with Turner syndrome have a single X chromosome.
Do people with klinefelter's syndrome have happy trails?
Klinefelter syndrome is a genetic condition affecting males, characterized by an extra X chromosome. While some individuals may experience changes in body hair distribution, including the appearance of a "happy trail" (a line of hair from the abdomen to the pubic area), this varies widely among individuals. Overall, the presence or absence of a happy trail is not a defining feature of Klinefelter syndrome and depends on various factors, including hormone levels and genetics.
Whst is the syndrome if a person has a karyotype with the chromosome XXY?
A person with a karyotype of XXy has Klinefelter syndrome, a genetic condition that occurs when males have an extra X chromosome. This can lead to developmental and physical differences, such as infertility, reduced facial and body hair, and taller stature. Treatment may involve hormone therapy and assistance in managing associated symptoms.
Could you recognize someone with klinefelter syndrome?
Klinefelter syndrome is a genetic condition that typically affects males, characterized by the presence of an extra X chromosome. Common physical features may include taller stature, broader hips, and reduced facial and body hair. However, these characteristics can vary widely among individuals, and many may not exhibit noticeable traits. Therefore, recognizing someone with Klinefelter syndrome solely based on physical appearance is not reliable, as diagnosis often requires genetic testing.
Where is a barr body found?
A Barr body is the inactivated X chromosome that is usually found in the nuclei of female somatic cells. It can also occur in males when there is an abnormality and the male is XXY instead of the normal XY, a condition known as Klinefelter's syndrome. In this case, the male somatic cells would also contain a Barr body. --- The Barr body is the highly-condensed chromatin structure taken up by an inctivated X chromosome. The number of Barr bodies equal the number of inactive chromosomes.
