Human Heredity 11th Edition by Michael Cummings

Exercise 14

Construct a pedigree, given the following information. Mary is 16 weeks pregnant and was referred for genetic counseling because of advanced maternal age. Mary has one daughter, Sarah, who is 5 years old. Mary has three older sisters and four younger brothers. The two oldest sisters are married, and each has one son. All her brothers are married, but none has any children. Mary's parents are both alive, and she has two maternal uncles and three paternal aunts. Mary's husband, John, has two brothers, one older and one younger, neither of whom is married. John's mother is alive, but his father is deceased.