<prompt> Answer this question truthfullyCould you please provide me with a working prompt to rephrase? This appears to be grammatically correct as it stands.  <response>: <reason> 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.Cat eye syndrome where tetrasomy of chromosome 22 is present Pallister-Killian syndrome tetrasomy 12p Tetrasomy 9p Tetrasomy 18p48, XXX syndrome 48, XXYY syndrome Klinefelters syndrome, where XXXY tetrasomy is presentTemplate:Chromosomal abnormalitiesTemplate:WH Template:WS 