- Source: Tetrasomy
A tetrasomy is a form of aneuploidy with the presence of four copies, instead of the normal two, of a particular chromosome.
Causes
= Full
=Full tetrasomy of an individual occurs due to non-disjunction when the cells are dividing (meiosis I or II) to form egg and sperm cells (gametogenesis). This can result in extra chromosomes in a sperm or egg cell. After fertilization, the resulting fetus has 48 chromosomes instead of the typical 46.
= Autosomal tetrasomies
=Cat eye syndrome where partial tetrasomy of chromosome 22 is present
Pallister-Killian syndrome (tetrasomy 12p)
Tetrasomy 9p
Tetrasomy 18p
Tetrasomy 21, a rare form of Down syndrome
= Sex-chromosome tetrasomies
=Tetrasomy X
XXYY syndrome
External links
Kata Kunci Pencarian:
- Sindrom Klinefelter
- Sindrom Empat X
- Tetrasomy X
- Tetrasomy
- Tetrasomy 9p
- Pentasomy X
- XXXX
- Pallister–Killian syndrome
- Tetrasomy (disambiguation)
- Trisomy X
- Tetrasomy 18p
- Polysomy
