in science today, they were teaching us about how the X's and the Y's determine which sex the baby will be.(one X from mom and one X from dad means a girl...and one X from mom and one Y from dad means a boy) how are some babies transgendered? is it like mutation in the reproduction process of the cell? or what?
2006-10-20 13:01:09 · 5 answers · asked by Anonymous in Pregnancy & Parenting ➔ Newborn & Baby
its a chromosonal disorder, and there are several including:
Klinefelter's syndrome (XXY)
Trisomy X (XXX)
Double-Y syndrome (XYY)
Cytogenetic Mosaics
The term mosaic is usually applied to an animal that has more than one cytogenetically-distinct population of cells. For example, in a human mosaic, some of the cells might be 46, XX and some 47, XXX. The fraction of cells having each genotype is quite variable, reflecting how early during embryogenesis the mosaicism originated. In most but not all cases, the mosaicism can be detected in cells from all tissues.
What is the clinical significance of mosaicism? If the proportion of cytogenetically abnormal cells in a mosaic is sufficiently large, that individual will manifest disease. Conversely, if the abnormal cells are proportionally small in comparison to cytogenetically normal cells, the normal cells may be sufficient to prevent disease or reduce its severity. For example, a large majority of humans having Turner's syndrome (X chromosome monosomy) die prior to birth. Many of the Turner's individuals that do survive are found to be mosaics with a substantial fraction of normal cells (e.g. 46 XX/45 XO mosaics).
X chromosome Mosaicism
Early in embryogenesis in mammals, all but one X chromosome are functionally inactivated through a process called X chromosome inactivation. Because this inactivation occurs randomly, all normal females have roughly equal populations of two genetically different cell types and are therefore a type of mosaic. In roughly half of their cells, the paternal X chromosome has been inactivated, and in the other half the maternal X chromosome is inactive. This has a number of important biological and medical implications, particularly with regard to X-linked genetic diseases.
chimerism
In medical science, a chimera is an individual having more than one genetically-distinct population of cells that originated from more than one zygote. How is this possible?
This happens when one twin absorbs the other during gestation. It is only detectable if it happens with fraternal twins, resulting in one person with the DNA of two separate people, who may have two different blood types. This is extremely rare, only about 30 cases are known, but if identical twins were to merge it would be impossible to detect so the incidence of chimerism may be higher (but still very, very rare).
2006-10-20 13:44:20 · answer #1 · answered by tpuahlekcip 6 · 2⤊ 0⤋
It kinda depends what you mean by "transgendered". If we're talking about ambiguous genitalia (rather than people who feel they're trapped in a body of the wrong sex), it's generally a defect in maturation.
Female is sort of the "default" body plan for humans. Males are modifications of this plan caused by different hormones, etc at different stages of development.
2006-10-21 21:30:04 · answer #2 · answered by sdc_99 5 · 0⤊ 0⤋
Actually i heard that the guys sperm has the x and the y so if there's a x that fertilize the mom's egg there will have a girl but I'm not to sure but trans generate means that a sperm x and y fertilized the egg at the same time.
2006-10-20 20:18:39 · answer #3 · answered by luvboys1 2 · 0⤊ 0⤋
Babys are transgendered by getting an extra chromasome from a parent, xxy.
2006-10-20 20:10:43 · answer #4 · answered by 8p8a 3 · 1⤊ 0⤋
yes
2006-10-20 20:16:31 · answer #5 · answered by jay 1 · 0⤊ 1⤋