13.Which statement best explains how there can be orange and yellow butterflies of the same species? A. The orange butterflies receive two copies of the gene for color.
B. The yellow butterflies only receive one copy of the gene for color.
C. The butterflies choose to express their identical alleles differently.
D. The butterflies receive different alleles that determine their color.

the answer to this question is a

it is b

explanation: mark brainliest because i am trying to get to the next level and i just need 1 more

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: