You are presented with the question "What are one thing the combination of proteins and DNA make up?" and the following answer choices: 
- alleles
 - sperm
 - insects
 - embryos
 - fusion
 - PDAs
 - humans
 - complex

Now knowing that chromosomes are coiled structures made of DNA and proteins and an egg or sperm with an extra chromosome or missing a chromosome is then made, choose the best answer.


 

  sperm       