Brown [b] is recessive to black [B] in mice fur color. However, another gene controls the deposition of the pigment. The deposition of the
pigment is dominant [C] and no pigment deposition [C] is recessive
producing white fur.
The following cross was made:
bbCc X BBcc
What are the phenotypes of the offspring from this cross?
50% brown mice and 50% black mice
25% black mice, 25% brown mice and 50% white mice
50% black mice and 50% white mice
50% brown mice and 50% white mice

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.