Which phrase most likely describes the environment in which this rock
formed?

Rocks form in one of two distinct environments: either below the surface of the earth or at ... Some of the more common rock-forming minerals are quartz, feldspar, ... that word, triad?) of rocks that compose the planet are igneous, sedimentary, ... the concept of metamorphic grade to describe how 'metamorphosed' a rock is.

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.