Do you think most traits are inherited the way mouse fur color is? why do you think this is?

Yes, the given statement is correct.  

When the two traits from each of the parent are inherited, the dominant trait always demonstrates its characteristic even if there is a presence of a recessive trait.  

The dominant and recessive terms illustrate the patterns of inheritance of some kinds of traits. For a recessive allele to generate a recessive phenotype, the individual must exhibit two copies, that is, one from each parent. An individual with one recessive and one dominant allele for a gene will exhibit the dominant phenotype.  

which

what is a measurement of the earth’s history divided into time periods?

> fossil record <

sedimentary rock

> geologic time scale <

radioactive elements