Which part of a scientific argument must be supported by valid data? O claim
O evidence
O reasoning
O theory

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

How many copies of genes do gametes have?

4. multiple crosses were made between true-breeding lines of black and yellow labrador retrievers. all the f1 progeny were black. when these progeny were intercrossed, they produced an f2 consisting of 91 black, 39 yellow and 30 chocolate. a. propose an explanation for the inheritance of coat color in labradors. b. propose a biochemical pathway for coat color determination and indicate how the relevant genes control coat coloration.