Apill that contains no active ingredients is given to a control group. which is this type of pill called?

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Variety of living organisms; includes genetic, species, and ecological types.

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.