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Across 3. genes that show their effective even if there is only one allele for that trait in the pair. 6. the organism observed characteristics 9. the cell body of a neuron 10. area of the brain named after Paul Broca 14. finger like projections from a neurons soma that receive incoming messages from other neurons. 21. the difference in eletrical charge between the inside and outside of the axon when the neurons are at a rest 22. the growth and formation of new dendrites 23. small segments of DNA that contain information for producing proteins. 25. the process by which many genes interact to create a single characteristic 26. chemically charged particles that pre dominate in bodily fluids found both inside and outside cells. 27. systems of glands that secrete and regulate hormones in the body. 28. chemicals secreted by glands travel in the blood stream carrying messages to tissues and organs all over the body 29. different forms of a gene 30. a limbic structure that wraps itself around the thalamus. It plays a vital role in learning and memory.

Down 1. deficit in the ability to speak of communicate language. 2. the junctions between an axon and the adjacent neuron, where information is transmitted from one neuron to another. 4. transmits sensory information to the brain an spinal cord to the skeletal muscles. 5. a neurotransmitter released in response to behaviors that feel good or are rewarding to the person or animals voluntary motor control. 7. genetic and environmental similarities compared and contrasted in this type of study 8. the extent to which a characteristic is influenced by genetics 11. involved in body movement, balance, coordination, fine-tuning motor skills, and cognitive activities such as learning and language. 12. thin outter layer of the cerebrum in which much of human thought, planning, perception, and consciousness takes place 13. chemicals released from adrenal glands that function as hormones and as neurotransmitters to control ANS activation. 15. Its a cellular structure that holds our genetic information in thread like strands of DNA. 16. little knobs at the end of the axon that contain tiny sacs of neurotransmitters 17. genes that show their effective only when both alleles are the same 18. nerve calls that are active when we observe others preforming a action as well as when we are preforming the same action 19. nerve cells that receive incoming sensory information from the sense organs. 20. neurons that communicate only with other neurons. 24. the most common excitatory neurotransmitter in the brain