John and Jane Jones’ newborn baby girl, Leah, has just been diagnosed with galactosemia. Prior to their genetic counseling appointment, they submitted this family history: John and Jane’s older child, a son named Lee, does not have galactosemia. John is the only child of Hanna and Harry. Harry was an only child. Hanna has two older sisters, Hope (the oldest) and Holly. Both Harry and Hanna’s parents lived in good health into their 80s. Jane’s brother, Joe, is married to Jen. They have a son, Les, who is a

They have a son , Les who is 9 years old and healthy with myopia but not galactosemia. Les is unaffected with galactosemia.

Explanation:

From the family story, Leah is the only child affected with galactosemia while Les is unaffected and healthy.

Hanna's father and mother have three daughters and they are Hope, Holly and Banana( from oldest to youngest).

Hanan and Harry have an only son called John.

John married Jane and they have two children, Leah and Les.

Leah is girl that is affected with galactosemia and Les who is a boy and he is unaffected with galactosemia.

Jane's mother is Hilda and she has a brother called Joe. Joe married Jen and they have a son called Les.

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.