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

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.

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.