What condition is characterized by lymphocytic pleocytosis in the cerebrospinal fluid (CSF), but a lack of identifiable organism after routine culture and Gram stain

Chimeras are interesting organisms that have two different sets of dna. chimeras occur when when two different zygotes fuse to form one organism. some chimeras have no outward symptoms,while some have two different eye colors it two different blood types what roles do mitosis and meiosis play in the process