Answer: A tsunami is a giant wave (or series of waves) created by an undersea earthquake, volcanic eruption or landslide. Tsunamis are often called tidal waves, but this is not an accurate description because tides have little effect on giant tsunami waves.
Xyy redirects here. For the CIE XyY colour model, see XyY. XYY syndrome is a genetic condition in which a human male has an extra male (Y) chromosome, giving a total of 47 chromosomes instead of the more usual 46. This produces a 47,XYY karyotype, which occurs every 1 in 1,000 male births.or the CIE XyY colour model, see XyY. XYY syndrome is a genetic condition in which a human male has an extra male (Y) chromosome, giving a total of 47 chromosomes instead of the more usual 46. This produces a 47,XYY karyotype, which occurs every 1 in 1,000 male births.
In the mosaic form of triple X syndrome only a number of body cells have the extra chromosome. Most cases of triple X syndrome are caused by a malformed egg or sperm. Triple X syndrome is sometimes called 47, XXX syndrome because the extra chromosome gives that human 47 chromosomes (instead of the usual 46). girl with triple X syndrome may either have no symptoms, just mild ones, or more severe ones with developmental delays. Developmental delays may include learning disabilities, delayed development of speech and language skills, as well as motor skills.