Which best describes a chain reaction associated with a nuclear reaction?

true, i don't really know what you're asking but from the info you provided im guessing the answer is true.

the answer to your question is slate

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.