Destiny has distal symphalangism - her fingers and toes are stiff, with tiny nails. She looks it up and finds it is an autosomal dominant trait. Since her parents do not have it, she reasons that she has a new mutation. However, if she has children, each of them, assuming her partner does not have the condition, has a(n) probability of inheriting the condition.

... has a 1/2  probability of inheriting the condition.

Explanation:

Distal symphalangism is a rare genetic disorder associated with the fusion of the distal interphalangeal joints of the hands and/or the feet that causes the rigidity of these joints  

"griffith's experiment discovering the "transforming principle" in pneumococcus bacteria. griffith's experiment, reported in 1928 by frederick griffith, was the first experiment suggesting that bacteria are capable of transferring genetic information through a process known as transformation." - griffith's experiment.

the correct answer is b