Across
- 2. In the life cycle of an organism hit reproduces sexually, a cell containing a single set of chromosomes
- 6. the spindle fibers attach to the centromeres of the chromosomes and line up the chromosomes along the center of the cell
- 7. during this time it grows, replicates its chromosomes, and prepares for cell division.
- 8. an organism's reproductive cells.
- 9. one pair of chromosomes
- 11. any cell of a living organism other than the reproductive cells.
- 16. the chromosomes condense, and a new set of spindle fibers forms.
- 17. the indentation of the cell's surface that begins the progression of cleavage,
- 21. the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells.
- 22. The cells pinch in the center and divide again
- 23. cells that result from the division of a single parent cell.
- 24. normal genes that slow down cell division or tell cells to die at the right time
- 25. a group of proteins that control the progression of the cell cycle by activating particular enzymes
- 26. a structure that forms when the cytoplasm of a plant cell divides
- 28. the centromeres of the paired chromatids align along the equatorial plate in both cells.
- 30. a form of gamete or reproductive cell found in the male human body.
- 31. a type of cell division in sexually reproducing organisms that reduces the number of chromosomes in gametes
- 32. A type of cell death in which a series of molecular steps in a cell lead to its death.
- 37. the exchange of DNA between paired homologous chromosome that occurs during the development of egg and sperm cells.
- 39. The process by which two gamete fuse to become a zygote, which develops into a new organism.
- 42. the molecule that carries genetic information for the development and functioning of an organism.
- 43. the alternative form or versions of a gene.
- 44. the gelatinous liquid that fills the inside of a cell.
- 47. The stage of meiotic or mitotic cell division in which the chromosomes move away from one another to opposite poles of the spindle.
- 48. The first growth phase of the cell cycle, consisting of the portion of interphase before DNA synthesis begins.
- 49. the process when homologous chromosomes line up along the equator of the cell.
- 51. the presence of two complete sets of chromosomes in an organism's cells, with each parent contributing a chromosome to each pair.
- 52. encodes a nuclear protein that acts as a cell cycle control checkpoint at the G1 phase.
- 53. The chromatids split at the centromere and migrate along the spindle fibers to opposite poles.
- 54. threadlike structures made of protein and a single molecule of DNA that serve to carry the genomic information from cell to cell. I
- 59. the region where the cell's spindle fibers attach.
- 61. one of a pair of chromosomes with the same gene sequence, loc
- 62. Cells division of the nucleus. Final product is 2 cells that are exactly like the parent cell.
- 64. a condition, tumor, or growth that is not cancerous.
Down
- 1. paired barrel-shaped organelles located in the cytoplasm of animal cells near the nuclear envelope.
- 3. the process in witch the cells are duplicating, making clones of the parent cells
- 4. The fibers that form a protein structure that divides the genetic material in a cell.
- 5. An enzyme in cells that helps keep them alive by adding DNA to telomeres
- 10. phase when the chromosomes have finished moving to opposite ends of the cell.
- 12. the complex of DNA and protein known as chromatin condenses to form chromosomes.
- 13. an individual's complete set of chromosomes.
- 14. The reproduction of a cell through duplication of the genome and division of the cytoplasm.
- 15. where the chromosomes line up in metaphase before they split
- 16. A gene that makes a protein that is found inside the nucleus of cells and plays a key role in controlling cell division and cell death.
- 18. cell A cell that is the source of other cells, as a cell that divides to produce two or more daughter cells, or a stem cell that is a progenitor of other cells or is the first in a line of developing cells.
- 19. a reproductive cell of an animal or plant
- 20. proteases that specifically cleave tetrapeptide substrates
- 27. structures made from DNA sequences and proteins found at the ends of chromosomes.
- 28. whos the best teacher
- 29. An abnormal mass of tissue that forms when cells grow and divide more than they should or do not die when they should
- 33. A paired set of homologous chromosomes, each composed of two sister chromatids.
- 34. A normal gene, that through mutation, can be converted to a cancer-causing gene.
- 35. a period of rest that certain species' cells experience between meiosis I and meiosis II.
- 36. a protein lattice that resembles railroad tracks and connects paired homologous chromosomes in most meiotic systems.
- 38. the phase where cell prepares for the mitotic division
- 40. a mitotic division of each of the haploid cells produced in meiosis I.
- 41. the production of new organisms by the combination of genetic information of two individuals of different sexes
- 45. fertilized egg cell that results from the union of a female gamete
- 46. the pairing of two chromosomes that occurs during meiosis
- 50. a form of asexual reproduction in which an organism divides into two, each part carrying one copy of genetic material.”
- 55. A disease characterized by the presence of malignant tumors (rapidly growing and spreading masses of abnormal body cells) in the body.
- 56. the first stage in the meiotic division or the reduction division of the meiosis.
- 57. a phase of cell division where two new nuclear membranes form around the chromosomes to produce two distinct nuclei.
- 58. series of events that cells go through as they grow and divide
- 60. the material of which the chromosomes of organisms other than bacteria are composed.
- 63. a female Gamete