Across 7. Organic molecules that copy the code from DNA in the nucleus and carries it to the cytoplasm 8. An allele that is masked when a dominant allele is present 9. A gene that is carried on the X or Y chromosome 11. A segment of DNA on a chromosome that codes for a specific trait 12. Having two different alleles for a trait 13. An organism that has two different alleles for a trait (heterozygous) 15. Produces the female sex cells in plants (eggs) 17. The different forms of a gene 18. A change in a gene or chromosome 19. Ribonucleic acid, a nucleic acid that plays an important role in the production of proteins 20. The stage of the cell cycle that takes place before cell division occurs, during this stage the cell grows, copies its DNA, and prepares to divide 23. A condition in which neither of two alleles of a gene is dominant or recessive 24. Produces the male sex cells in plans (pollen) 25. A double rod of condensed chromatin, contains DNA that carries genetic information 26. An organism's physical appearance 27. The likelihood that a particular event will occur 29. The regular sequence of growth and division that cells undergo 31. The passing of traits from parent to offspring 32. All of the DNA in one cell of an organism 33. The stage of the cell cycle during which the cell's nucleus divides into two new nuclei and one copy of the DNA is distributed into each daughter cell

Down 1. Having two identical alleles for a trait 2. A chart that shows all the possible combinations of alleles that can result from a genetic cross 3. Deoxyribonucleic acid, the genetic material that carries information about an organism and is passed from parent to offspring 4. Organic molecules in the cytoplasm that carries an amino acid to the ribosome and adds it to the growing protein chain 5. The basic unit of structure and function in living things 6. The scientific study of heredity 10. A two-strand shape that twists like the threads of a screw 14. An allele whose trait always shows up in the organism when the allele is present 16. The process by which a cell makes a copy of the DNA in its nucleus 21. An organism that always produces offspring with the same form of a trait as the parent 22. An organism's genetic makeup, or allele combinations 23. The final stage of the cell cycle, in which the cell's cytoplasm divides , distributing the organelles into each of the two new cells 25. One of the identical rods of a chromosome 28. The process that occurs in sex cells (sperm and egg) by which the number of chromosomes is reduced by half 30. A characteristic that an organism can pass on to its offspring through its genes