A mutation may result change in the way you look, you could lose sight, could be born with some genetic issues.
Subsets of {dog, cat, fish} are Ф, {dog}, {cat}, {fish}, {dog, cat}, {dog, fish}, {cat, fish}, {dog, cat, fish}.
Answer: 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.
Cancer is the rapid, uncontrollable division of cells.
