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.
Comments: 14. On April 20th 1969, Oh! Happy Day by the Edwin Hawkins Singers featuring Dorothy Morrison entered Billboard's Hot Top 100 chart at position #72; and on May 25th it peaked at #4 (for 2 weeks) and spent 10 weeks on the Top 100...