Across
- 5. A new cell formed by cell replication.
- 6. A stem cell that can differentiate only into one cell type.
- 10. Penetration of the egg by the sperm, and fusion of the egg and sperm nuclei.
- 11. Realting to a trait or phenotype whose appearance is subordinate to a dominant trait.
- 13. Stage of mitosis where sister chromatids are pulled to opposite poles.
- 15. A visual depiction of the number, size and shape of chromosomes in a individual.
- 17. A phenotype that is observed only in homozygous individuals.
- 18. Primary layer of cells formed during embryogenesis.
- 20. A part of the chromosome that attaches to spindle fibres during mitosis, and where the two sister chromatids are joined.
- 21. A cell that can give rise to any cell type and potentially complete a new organism.
- 23. The site on a chromosome where a particular gene is located.
- 24. The events in the life of a cell from its formation by cell division through its growth and function until it divides again.
- 26. The process by which a single cell divides into two or more daughter cells.
- 29. The phase in the cell cycle when the cell is not undergoing mitosis.
- 31. A form of asexual reproduction in unicellular organisms, in which the parent cell divides into two parts.
- 32. Carry the same genes in the same loci
- 34. Inheritance of a trait passed from father to son.
- 36. A diploid organism with two identical alleles at a particular genetic locus
- 37. A form of asexual reproduction in which an organism breaks into two or more parts. Each of which regenerates the missing parts to form a complete organism.
- 38. The blastula stage in the development of a mammalian embryo.
- 42. A division of the nucleus that results in 4 genetically unique daughter cells.
- 43. A cross between individuals that have different pairs of alleles of a particular gene.
- 44. Containing half the normal number of chromosomes.
- 45. A complex structure consisting of DNA strands coiled around histone proteins, carrying the hereditary information of the cell in the form of genes.
- 46. The process of replication that creates a new biological entity such as a gene cell tissue or organism.
- 47. Process of cell death that involves a characteristic series of steps. also known as programmed cell death.
- 49. Deoxyribonucleic Acid.
- 50. The middle layer of the 3 primary germ layers in the early embryo.
- 52. An individual that has an allele for a condition but does not express the condition because it is masked by the dominant phenotype.
- 53. Inheritance of a gene on the x chromosome.
Down
- 1. A division of the nucleus that results in 2 genetically identical daughter cells.
- 2. The exchange of chromosomal material between non-sister chromatids of a homologous chromosome.
- 3. The expression of one allele of a gene rather than the other allele of the same gene.
- 4. The combination of alleles for a trait carried by an individual.
- 7. Able to be passed from parent to offspring, or from one generation to the next.
- 8. A cell that can develop only into cells of a similar type.
- 9. An observable characteristic or trait in an organism.
- 12. A section of DNA that contains instructions for making proteins.
- 14. One of the two copies of the chromosome formed during the S stage of Interphase.
- 16. Reproduction in which one parent gives rise to a new individual from its body cells. The resulting off-springs are genetically identical to their parent.
- 19. A form of asexual reproduction found in plants. In which a piece of plant is separated from the plant an grows into a new plant.
- 22. A cell that can develop into several different cell types.
- 25. A diploid individual with different alleles for a particular gene.
- 27. A form of asexual reproduction in unicellular organisms.
- 28. A form of asexual reproduction in which a new individual arises as an outgrowth or bud from the parent.
- 30. The development of an egg in the absence of fertilisation by sperm.
- 33. The division of a cell following meiosis or mitosis.
- 35. Two sets of chromosomes.
- 39. The occurrence of a phenotype in a heterozygote that results from the expression of both alleles.
- 40. An individual produced by a cross between parents with different genotypes.
- 41. The outermost layer of the three primary germ layers.
- 48. A haploid cell that when joining with another haploid cell becomes a zygote.
- 51. A cell that can differentiate into a specialised cell.