Question

Several members of the Fitzsimmons family have polydactyly, and they differ in their numbers of extra fingers and toes. Yet certain relatives who should have extra digits don't, such as Megan Fitzsimmons. She has two children, a son with 2 extra fingers and a daughter with an extra toe; Megan's father has an extra digit on each hand and foot.Polydactyly in this family is___________.

Answer 1

variably expressive and incompletely penetrant

Step-by-step explanation:

Several members of the Fitzsimmons family have polydactyly, and they differ in their numbers of extra fingers and toes. Yet certain relatives who should have extra digits don't, such as Megan Fitzsimmons. She has two children, a son with 2 extra fingers and a daughter with an extra toe; Megan's father has an extra digit on each hand and foot. Polydactyly in this family is variably expressive and incompletely penetrant.