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Across 3. growth and DNA replication phase before mitosis or meiosis begins 6. when both alleles contribute to the phenotype 8. when one allele is not completely dominant over another 9. bundled package of DNA 11. physical characteristics 12. organisms that have two different alleles for the same trait 16. traits controlled by two or more genes 17. diagram showing the relative locations of each known gene on a particular chromosome 19. a process of reduction division in which the number of chromosomes is cut in half 20. states that some alleles are dominant and others are reccesive 23. cell division that results in two diploid cells 24. when genes have more than two alleles 28. crosses between parents with different traits 31. a cell that has one set of homologous chromosomes 32. spindle fibers pull chromosomes toward opposite ends of the cell 33. organisms that have two identical alleles for a particular trait 34. a cell that contains both sets of homologous chromosomes 35. the different forms of a gene 36. the scientific study of heredity 37. sex cells

Down 1. states that genes for different traits can segregate independently during formation 2. chemical factors that determine traits 4. a specific characteristic 5. a diagram that can determine the possible gene combinations 6. process in which homologous chromosomes 7. chromosomes line up on the metaphase plate 10. separation of alleles during gamete formation 13. fertilized egg 14. the division of the cytoplasm 15. the process in which the male and female reproductive cells join together 18. organism that produce offspring identical to themselves through self pollination 21. term used to refer to chromosomes that each have a corresponding chromosome 22. nuclear membrane forms around each cluster of chromosomes 25. the likelihood that a particular event will occur 26. prophase structure of chromosome paired with its corresponding homologous chromosome 27. uncondensed DNA and proteins (called histones) 29. homologous chromosomes pair 30. genetic makeup