In what way is plant cell division different from animal cell division?

Write a paper (500-750 words) outlining how disorders such as Trisomy 21 occur. Be sure to address the following questions:

When does DNA replication take place in the cell cycle?
When do strands of DNA form chromosomes?
What is a replicated chromosome? How does this differ from a chromosome pair?
Is a cell containing replicated chromosomes haploid, diploid, or neither? Why?
Why is anaphase important and unique in terms of chromosome number?

Students should use a minimum of three scholarly sources. Remember that Wikipedia is not considered a scholarly source.