Across 8. F1 monohybrid genotypic ratio 9 Gene combination in the offspring 11 F1 dihybrid phenotypic ratio 13. Letter used to represent a dominant allele 14. Transferring pollen grains from anthers to the stigma of a flower 15. Cross involving two traits 17 stronger of two alleles which shows up most often 20. The weaker of two alleles in a pair that is often masked by the dominant allele 21. Male part of a flower 22. Crossing a hybrid with a homozygous dominant or homozygous recessive organism resulting in a 1:1 ratio 24. How Mendel had to pollinate peas in order to produce various traits 26. Transmission of characteristics from parent to offspring 27. Instructions on DNA that code for specific proteins or traits 28. Two forms of a gene 29. Type of genetics that studies genes and chromosomes 31. Female part of a flower 34. What Mendel called alleles in his experiments with pea plants? 35. Father of genetics 36. Identical alleles AA or aa 37. A genetically determined characteristic 38. Law stating that alleles separate independently of each other in gamete formation Down 1. Used to help solve genetic problems 2. Physical feature determined by the genotype 3. Another word for a heterozygous genotype 4. Shows a 3:1 ratio of phenotypes 5. Occurs whenever both alleles for a gene are expressed 6. Generation of all hybrids produced by crossing two pure organisms 7. Plant studied by Gregor Mendel 10. Study of how characteristics are transmitted from parents to offspring 12. F1 monohybrid phenotypic ratio 16. Dominance that occurs whenever the hybrid genotype produces a new intermediate phenotype 18. A genotype having one dominant and one recessive allele 19. The likelihood that an event will occur like tossing coins 23. The generation of true-breeding plants that Mendel used first 25. How garden peas pollinate 30. Dominance in which the dominant allele is always expressed 32. Law stating that a pair of alleles will separate whenever gametes are formed 33. A genetic cross involving a single trait​