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Across 2. the specific location of a gene on a chromosome 8. the exchange of chromosome segments between homologous chromosomes during Prophase I 9. the mating of two organisms 10. the second generation from the p-generation 11. grid system for predicting all the possible genotypic results from given parental genotypes 13. alternate forms of a gene that may occur at a specific locus 15. crosses examining the inheritance of only one trait 20. both alleles are dominant and expressed with uppercase letters 23. one allele is dominant and the other is recessvie; expressed as one uppercase and one lowercase 25. the division of sister chromatids 27. a cross between an organism of unknown genotype and an organism with the recessive phenotype 28. having more than 5 fingers or toes 29. both alleles are recessive and expressed with lower case letters 30. the separation of sister chromatids that move to opposite sides of the cell 31. the allele that is expressed when at least one is present

Down 1. genetically uniform and always produces the same thing 2. allele pairs separate independently of each other during gametogenesis 3. Mendel's 1st law that states that an individual will inherit 2 copies of each gene which will separate out during Meiosis to different gametes 4. the allele that can only be expressed if both are recessive 5. the first generation from the p-generation 6. an inherited characteristic 7. duplicated copies of DNA held together by centromeres 12. the study of how traits are inherited 14. genes located close together on the same chromosome and tend to be inherited together 16. a mixture of different genes that do not always produce the same traits in successive offspring 17. the division of homologous chromosomes 18. Lining up in the middle of homologous chromosomes 19. crosses that examine the inheritance patterns of two traits 21. the allele combination; the genetic makeup of specific genes 22. the physical expression of a trait; its appearance 24. a segment of DNA code that holds the instructions for how to build a specific protein; represented on a karyotype as bands or stripes 26. all of an organism's genes on it's DNA