Because each possibility is equally likely, genotypic ratios can be determined from a Punnett square. If the pattern of inheritance (dominant or recessive) is known, the phenotypic ratios can be inferred as well. For a monohybrid cross of two true-breeding parents, each parent contributes one type of allele. In this case, only one genotype is possible.
Occult (hidden) bacteremia is the presence of bacteria in the bloodstream of a child who has a fever but who looks well and has no obvious source of infection. Most commonly, occult bacteremia is caused by Streptococcus pneumoniae bacteria. Typically, children have no symptoms other than fever.
occult fracture. a fracture that cannot be detected by radiographic standard examination until several weeks after injury. The break is most likely to occur in the ribs, tibia, metatarsals, hip, or navicular. It is accompanied by the usual signs of pain and trauma and may produce soft tissue edema. Magnetic resonance imaging or a bone scan may be used to confirm a suspected occult fracture.