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What common condition is caused by the presence of three copies is chromosomes 21?
Down syndrome
What does the karyotype of a person with down syndrome show?
A genetic disorder caused by the presence of all or part of a third copy of chromosome 21.
What is translocation downs syndrone?
Translocation Down syndrome is a genetic condition caused by the presence of an extra chromosome 21 due to a rearrangement of genetic material between chromosomes. Unlike the more common forms of Down syndrome, which result from an extra full chromosome 21, translocation Down syndrome occurs when a portion of chromosome 21 becomes attached to another chromosome. This can happen during the formation of reproductive cells or in early fetal development. Individuals with translocation Down syndrome typically exhibit the same physical and cognitive characteristics associated with Down syndrome.
What is the genetic disorder associated with chromosome 5 monosomy?
The most common condition associated with a deletion of the end of chromosome 5 is: cri-du-chat syndrome.
Which hypothyroid condition is thought to be caused by autoimmune factors?
Hashimoto's disease is the most common hypothyroid condition caused by autoimmune factors.
What common condition is caused by the presence of three copies of chromosome 21?
Most cases of Down syndrome result from trisomy 21, which means each cell in the body has three copies of chromosome 21 instead of the usual two copies. The extra genetic material disrupts the normal course of development, causing the characteristic features of Down syndrome.Hope this helps.
Is Down syndrome caused by a recessive gene?
Down syndrome is caused by a third copy on chromosome 21 and is present at conception or shortly after. It is mostly a random (and relatively common) occurrence, unless it is of the translocation type which is rare and genetic.
What is the Term that refers to a trait coded for by an allele on a sex chromosome?
The term that refers to a trait coded for by an allele on a sex chromosome is "sex-linked trait." These traits are often associated with genes located on the X or Y chromosomes, with X-linked traits being more common due to the presence of more genes on the X chromosome. Conditions such as hemophilia and color blindness are examples of disorders caused by X-linked alleles.
What is kliefelters syndrome?
Klinefelter syndrome is a genetic condition that results when a boy is born with an extra copy of the X chromosome. Klinefelter syndrome is a common genetic condition affecting males.
Why are sex linked conditions more common in men than in women?
Sex-linked conditions, particularly those linked to the X chromosome, are more common in men because they have only one X chromosome (XY), while women have two (XX). If a man inherits a recessive allele for a condition on his single X chromosome, he will express that condition. In contrast, a woman would need to inherit two copies of the recessive allele (one from each X chromosome) to express the condition, making it less likely for women to be affected. Thus, the single X chromosome in men increases their susceptibility to X-linked disorders.
What does it mean when someone has an extra chromosome?
If someone has an extra chromosome it means there was a genetic mutation that is abnormal in human development. It may result in problems with the person affecting them on a basic level, or may go fully unnoticed. A common disorder that can be caused by having an extra chromosome is Down's Syndrome.
Is edwards syndrome more common in boys or girls?
Edwards syndrome (trisomy 18) occurs more frequently in girls than boys. It is a genetic disorder caused by the presence of an extra copy of chromosome 18, leading to developmental abnormalities and various physical and mental impairments.
