In guinea pigs, black fur is the dominant trait. If a white guinea pig mates with a guinea pig that is heterozygous for its black fur, which combination of offspring best represents the likely outcome from the cross? A.
1 black fur, 20 white fur

B.
11 black fur, 9 white fur

C.
19 black fur, 1 white fur

D.
16 black fur, 4 white fur

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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one "light year" is the distance that light travels, through vacuum, in one julian year.   that's 365.25 days, of 24 hours each.

you get 2.3=1.21*\frac{a}2 or 4.6=1.21a or a=3.802 (b)

explanation: