It is trisomy of sex chromosomes. Normally, a human girl would be XX genotypically, but she inherits an extra X from either her mother or her father (due to nondisjunction in either one parent's gametes in meosis) so she has one extra chromosome, or a triploidy
A normal human is diploid, so they would have XX
A triploid is one extra X
So it is XXX
Monosomy
trisomy
A trisomy. A monosomy is when there is only one of a chromosome. A trisomy is when there are three of a chromosome. In Klinefelter's syndrome, there are three sex chromosomes.
An example of nondisjunction in genotype is when a pair of homologous chromosomes fails to separate properly during cell division, leading to one daughter cell receiving an extra chromosome (trisomy) and the other cell lacking that chromosome (monosomy). This can result in genetic disorders such as Down syndrome, which is caused by an extra copy of chromosome 21.
Monosomy occurs when one chromosome is absent from the normal diploid number. This is referred to as aneuploidy which is the loss or gain of a chromosome during meiosis.An example of monosomy is Turner Syndrome. One of the sex chromosomes is missing. In an unaffected female there are 2 'X' chromosomes. But in Turner Syndrome there is one sex chromosome missing.Trisomy occurs when there is three copies of a chromosome instead of the normal diploid number. This is also referred to as aneuploidy because there was an extra chromosome added hence, an abnormal amount of chromosomes.An example of trisomy is in Trisomy 21(Downs Syndrome) in which chromosome 21 has an extra chromosome.
The condition that is caused is a trisomy or a monosomy
No, that is false. Down Syndrome is also known as Trisomy-21. Monosomy is a condition where one chromosome is missing from what should be a pair in every cell throughout the body. Trisomy indicates a chromosome has three copies instead of a pair.
If a person is missing a chromosome, it is known as monosomy. Monosomy occurs when there is only one copy of a particular chromosome instead of the usual two copies. For example, a person missing one copy of chromosome 21 would have a condition called monosomy 21 or trisomy 21, which is also known as Down syndrome.
Here are two examples that result in 'early fetal death' - Trisomy 13 and Trisomy 18. Meaning that when the normal [genetic] chromosomal complement is a chromosome pair, three copies of each chromosome are present and this is lethal.
Trisomy means having three copies of a chromosomes. Turner's syndrome is NOT an example of trisomy. Someone with Turner's syndrome has only one X chromosome. Down's syndrome IS an example of trisomy. Someone with Down's syndrome has 3 copies of chromosome 21. Klinefelter's syndrome is a tricky one. On one hand, it would be considered trisomy because they have 3 sex chromosomes. However, they are not all the SAME sex chromosomes. Someone with Klinefelter's has 2 X chromosomes and one Y chromosome.
Trisomy zygotes typically have an extra chromosome, providing an extra copy of genetic material which can compensate for any missing genes and help maintain normal cellular function. Monosomy individuals, on the other hand, lack one chromosome which can lead to more severe genetic abnormalities and developmental issues, making survival less likely.
The l virus that usually causes mononucleosis is the "Epstein-Barr virus". However it can also be caused by "Cytomegalovirus".