Can some one help me out please

1. DNA Based  Even though the structure of DNA is the same for everyone, each person has a different sequence, or order, of base pairs in their DNA. This makes everyone's DNA different/unique.

Personal Based Things that make you different from everyone else would be your attitude, the way you talk, the way you walk, the way you dress, the things you like to do, etc.

2. Genes help to form traits, more than one gene can create a certain trait. Sometimes genes contain genetic abnormalities, or acquired mutations, which influence haw traits develop. Within genes, DNA contains 4 building blocks. (Adenine, cytosine, guanine, and thymine)

Hope this helps

Have a nice day((:

Explanation:

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.