How do index fossils assist in dating other fossils? A. Fossils found in rocks above the index fossils are older.
B. Fossils with similar physical features as the index fossils are the same age.
C. Fossils with the same chemical composition as index fossils are the same age
D. Fossils found in the same rock as the index fossil are considered to be the same age

Refer to the family pedigree shown here. in generation i, one parent is affected by the gene mutation and one parent isn't. in generation ii, all three children are affected by the gene mutation. what can you conclude about this gene mutation? a. all children born in future generations will be affected by this disorder. b. this gene mutation is a dominant disorder. c. this gene mutation is a recessive disorder. d. the generation i mother is a carrier of this gene mutation.