Given a scientific passage and an answer, generate a question for the given answer.

Passage: Viruses , like the one depicted in Figure below , are tiny particles that may cause disease. Human diseases caused by viruses include the common cold and flu. Do you think viruses are prokaryotes or eukaryotes? The answer may surprise you. Viruses are not cells at all, so they are neither prokaryotes nor eukaryotes. Answer: viruses
The common cold and flu are examples of human diseases caused by what tiny particles?

Passage: During meiosis, homologous chromosomes separate and go to different gametes. Thus, the two alleles for each gene also go to different gametes. At the same time, different chromosomes assort independently. As a result, alleles for different genes assort independently as well. In these ways, alleles are shuffled and recombined in each parent's gametes. Answer: during meiosis
When do homologous chromosomes separate and go to different gametes?

Passage: Chemical symbols are useful to concisely represent the elements present in a substance. The letters usually come from the name of the element. Answer: element
Chemical symbols are useful to concisely represent the elements present in a substance. the letters usually come from the name of what?