The answer is FORENSIC ANALYSIS DETERMINING THE GENE FUNCTION. Because researchers observe reverse genetics which is an experimental molecular genetics technique that allows researchers to educate gene function
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The expected growth mark marker for a 6 month old infant is that the infant can transfer objects from hand to hand, rolls from prone to supine, sits well unsupported, presents with stranger anxiety, and that the patient can babble.
When a specimen is to be observed under the light microscope, scientists usually stain the specimens using different type of chemical stains depending on the type of specimen to be observed. Staining of specimen make the structures that are to be observed in the specimen very visible under the microscope, this make it easy for scientists to observe their structures.