Recombination frequencies obtained from experimental crosses can be used for which of the following?

it's     c       this is a cell (b) with a nucleus (c) containing dna (a). the dna is organized into chromosomes (d). a section of the chromosome that codes for a trait is called a gene (e).

the answer is:

carbon dioxide

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully