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Across 4. an alternate form of a gene. 5. the sequence of nitrogen bases in a DNA molecule. 8. an organisms physical or outward appearance. 12. a genetic trait masked by a dominant trait. 13. a trait that covers up or masks the allele for a recessive trait. 14. G 15. a segment of chromosomes that contain a heredity trait of an organism. 17. C

Down 1. the genetic make up of an organism. 2. the genetic material for an organism. 3. a protein-like nucleic acid on genes that controls inheritance. 6. A 7. having similar alleles for a trait. 9. the likelihood or chance that a trait will occur. 10. having different alleles for a particular trait. 11. in genetics, a technique for predicting phenotype. 16. T