Joanna has “short fingers” (brachydactyly). She has two older brothers who are identical twins; both have short fingers. Joanna’s two younger sisters have normal fingers. Joanna’s mother has normal fingers, and her father has short fingers. Joanna’s paternal grandmother (her father’s mother) has short fingers; her paternal grandfather (her father’s father), who is now deceased, had normal fingers. Both of Joanna’s maternal grandparents (her mother’s parents) have normal fingers. Joanna marries Tom, who has normal fingers; they adopt a son named Bill who has normal fingers. Bill’s biological parents both have normal fingers. After adopting Bill, Joanna and Tom produce two children: an older daughter with short fingers and a younger son with normal fingers. a. Using standard symbols and labels, draw a pedigree illustrating the inheritance of short fingers in Joanna’s family
Joanna has “short fingers” (brachydactyly). She has two older brothers who are identical twins; both have short fingers. Joanna’s two younger sisters have normal fingers. Joanna’s mother has normal fingers, and her father has short fingers. Joanna’s paternal grandmother (her father’s mother) has short fingers; her paternal grandfather (her father’s father), who is now deceased, had normal fingers. Both of Joanna’s maternal grandparents (her mother’s parents) have normal fingers. Joanna marries Tom, who has normal fingers; they adopt a son named Bill who has normal fingers. Bill’s biological parents both have normal fingers. After adopting Bill, Joanna and Tom produce two children: an older daughter with short fingers and a younger son with normal fingers.
a. Using standard symbols and labels, draw a pedigree illustrating the inheritance of short fingers in Joanna’s family
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