Step 1 : Introduction to the question "Which of the following classic sitcom characters had only sisters for siblings?"
... A full sibling is a first-degree relative. A male sibling is a brother, and a female sibling is a sister. In most societies throughout the world, siblings often grow up together, thereby facilitating the development of strong emotional bonds.
Step 2 : Answer to the question "Which of the following classic sitcom characters had only sisters for siblings?"
The Cosby Show focuses on the Huxtable family, an upper middle-class African-American family living in Brooklyn. Theodore "Theo" Huxtable was the only son of Dr. Heathcliff "Cliff" and Clair Huxtable. They also have four daughters: Sondra, Denise, Vanessa, and Rudy. The part of Theo is played on the series by Malcolm-Jamal Warner. Warner auditioned for the role on the very last day of the nationwide search and was chosen by Cosby himself. The character is loosely based upon Cosby's only son Ennis. The Cosby Show spent five consecutive seasons as the number-one rated show on television.