22q11.2 deletion syndrome is caused by the deletion of a small section of chromosome 22. It results in a cleft palate, heart defects, autoimmune disorders, and more. The symptoms vary wildly and can be accompanied by learning disabilities and mental illness. Cystic fibrosis is caused by a point deletion.
The melody of Happy Birthday to You comes from the song  Good Morning to All , which has been attributed to American siblings Patty Hill and Mildred J. Hill in 1893, although the claim that the sisters composed the tune is disputed.
Related Tags. Don't Worry, Be Happy is the title and principal lyric of a song by musician Bobby McFerrin. In September of 1988, it became the first a cappella song to reach number one on the Billboard Hot 100 chart and held that position for two weeks. On the UK Singles Chart, the song reached number 2 during its fifth week on the chart.