A geneticist crossed pure breeding black mice (BB) with pure breeding brown mice (bb). All the mice in the F1 (first) generation had black coats. When these mice were crossed, they yielded 961 black-coated mice, and 317 brown-coated mice. The Punnett square below describes this cross. The numbers 1 to 4 are shown instead of the genotypes for the offspring.

Which of the genotypes, if any, is MOST likely to occur in the second generation that is shown in the Punnett square above? (2 points)

Group of answer choices

Bb

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answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.