Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Problem:Passage: (left) The DNA double helix wraps around proteins (2) and tightly coils a number of times to form a chromosome (5). This figure shows the complexity of the coiling process. The red dot shows the location of the centromere, where the microtubules attach during mitosis and meiosis. (right) A representation of a condensed eukaryotic chromosome, as seen after the DNA has been copied. The chromosome is made of two identical, or sister, chromatids held together by a centromere. Answer: chromosome
Solution:
What genetic unit is formed when the dna double helix wraps around proteins and tightly coils a number of times?