text: Calvin Bridges sketched a specific type of these structures that contain diffuse regions called Balbiani rings and puffs.
full_question: Calvin Bridges sketched a specific type of these structures that contain diffuse regions called Balbiani rings and puffs. Many plants and fungi contain extra "B" examples of these structures. In a widely-used technique, G-banding stains these structures. The two arms of these structures are denoted with the letters "p" and "q." Salivary glands in Drosophila are home to over-sized, (*) "polytene" examples of these structures. Miller-Dieker syndrome and cri-du-chat are examples of abnormalities in these structures, called "aneuploidies." Three of these structures are present in trisomies like Down syndrome, and can be easily visualized in a karyotype. For 10 points, name these DNA-containing structures that humans have 23 pairs of.
first_sentence: Calvin Bridges sketched a specific type of these structures that contain diffuse regions called Balbiani rings and puffs.
raw_answer: chromosomes [accept specific kinds, like polytene chromosomes and B chromosomes] 