Which of the following is not true about dna?

a.) the four nitrogenous bases are adenine, guanine, uracil, and cytosine.
b.) dna is made up of monomers called nucleotides.
c.) the structure of dna is a double helix.
d.) deoxyribose is a sugar found in dna.

I think the answer you are looking is

A. the four nitrogenous bases are adenine, guanine,uracil, and cytosine.

or

C. the structure of DNA is a double helix.

(im not sure if its correct)

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.

"do a testcross with a homozygous recessive plant."