How are doctors and paleontologists most similar? both diagnose injuries. both study bones. both look at preserved remains. both develop treatment plans.

Both study bones.

Explanation:

A palaeontologist is the one who studies fossils and palaeontology is on the border between biology and geology. Body and trace fossils are the main types of evidences that tell about the ancient life and its evolution. Some focus on fossil organisms too.

Doctor is a professional who practices medicine and studies human body. He performs similar tasks of studying human body and uses them as evidences for research on a particular subject. Hence it is considered that palaeontologist and doctors have study of bones as a similar thing between them. On the basis of above explanation  both study bones is a correct option.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.