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

Ex Input:
Passage: Regulation of transcription in prokaryotes typically involves operons. An operon is a region of DNA that consists of one or more genes that encode the proteins needed for a specific function. The operon also includes a promoter and an operator. The operator is a region of the operon where regulatory proteins bind. It is located near the promoter and helps regulate transcription of the operon genes. Answer: operon

Ex Output:
Which region of dna consists of one or more genes that encode the proteins needed for a specific function?

Ex Input:
Passage: Many genetic disorders are caused by mutations in one or a few genes. Other genetic disorders are caused by abnormal numbers of chromosomes. Answer: genetic disorders

Ex Output:
What type of disorders are caused by mutations in genes or abnormal numbers of chromosomes?

Ex Input:
Passage: Nephrons and Vessels The renal artery first divides into segmental arteries, followed by further branching to form interlobar arteries that pass through the renal columns to reach the cortex (Figure 25.9). The interlobar arteries, in turn, branch into arcuate arteries, cortical radiate arteries, and then into afferent arterioles. The afferent arterioles service about 1.3 million nephrons in each kidney. Answer: nephrons

Ex Output:
The afferent arterioles service about 1.3 million of what in each kidney?