Why is a pinhead sometimes used as an analogy for the early universe? a) matter was destroyed during the big bang. b) at time zero all matter was metallic. c) at time zero all matter was contained in a very small volume. d) matter was rapidly dispersed by the big bang.

Answer is c). At time zero all matter was contained in a very small volume.

All of the matter and energy in the universe was in a region smaller than the head of a pin and all of the energy and matter in the universe suddenly exploded out of a point smaller than the head of a pin.

answer: a. a gene that causes a specific trait.

i'm gonna put a couple so you can chose from

explanation:

if you know the fur color of the offspring mice, you can use the ratios to identify the genotypes of the parents.

if either parent mouse passes a dominant allele, the offspring will have black fur.

if the parental mice has two different fur color (i.e white and black) , the color of the offspring's fur would be either black, white, or the combination of both (grey)

hope this : )