Across
- 1. genes/ genes that show their effect even if there is only one allele for that trait in the pair
- 5. twins/ twins that develop from a single fertilized egg that splits into two independent cells
- 6. area/ area in the left frontal lobe responsible for the ability to produce speech
- 9. chemicals that transmit information between neurons
- 11. small segments of DNA that contain information for producing proteins
- 13. twins/ twins that develop from two different eggs fertilized by two different sperm
- 14. the organism's observed characteristics
- 15. study of changes in the way genes are turned on or off without a change in the sequence of DNA
- 17. all the genetic information in DNA
- 20. the growth and formation of new dendrites
- 21. the cell body of the neuron
- 22. different forms of a gene
- 23. callosum/ nerve fibers that connect the two hemispheres of the brain
- 24. potential/ the impulse of positive charge that runs down an axon
Down
- 2. transmission/ the hereditary passing on of traits determined by a single gene
- 3. genes/ genes that show their effects only when both alleles are the same
- 4. a coiled-up thread of DNA
- 7. the extent to which a characteristic is influenced by genetics
- 8. the cells that process and transmit information in the nervous system
- 10. the development of new neurons
- 12. genetics/ the scientific study of the role of heredity in behavior
- 16. the entire genetic makeup of an organism
- 18. a large molecule that contains genes
- 19. transmission/ the process by which many genes interact to create a single characteristic
- 22. deficit in the ability to speak or comprehend language