Dorothy Peterson was diagnosed with breast cancer. She and her doctor agreed upon treating this surgically with a/an:. This is a procedure in which the cancerous tissue with a margin of normal tissue is removed.

Cattle with brown fur and cattle with white fur will produce a reddish roan calf . when examined closely, the calf show about an even number of brown hairs and white hairs that give a reddish appearance when viewed from far away. the fact that both the brown fur allele and the white fur allele are expressed equally in the offspring is an example of