At fertilization, the chromosomes from the father's sperm unite with the chromosomes from the mother's egg, creating a new cell called a(n) __________

In terms of a within-subjects design, incorporating a __________, uses the same subjects in all treatments, but also compensates for __________ effects

A) control group : placebo B) random sequence : placebo C) balanced sequence : sequencing D) balanced sequence : matching

Abnormal microscopic structures develop in the brains of older persons with Down syndrome and those suffering from

A) Tay-Sachs disease. B) Alzheimer's disease. C) Korsakoff's syndrome. D) Parkinson's disease. E) status epilepticus.