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| 5855849112 | Genetics | The study of heredity and variation | 0 | |
| 5855853405 | Heredity | The transmission of traits from one generation to the next | 1 | |
| 5855855902 | Variation | The differences in appearance that offspring show from parents and siblings | 2 | |
| 5855867871 | Genes | The units of heredity | 3 | |
| 5855869655 | Locus | A specific location on a chromosome that a gene possesses | 4 | |
| 5855896984 | Gemetes | Genes that are passed to the next generation through reproductive cells | 5 | |
| 5855900524 | Asexual reproduction | One parent produces genetically identical offspring by mitosis | 6 | |
| 5855905187 | Clone | A group of genetically identical individuals from the same parent | 7 | |
| 5855907993 | Sexual reproduction | Two parents give rise to offspring that have unique combinations of genes inherited from both parents | 8 | |
| 5855915822 | Life cycle | The generation-to-generation sequence of stages in the reproductive history of an organism | 9 | |
| 5855925880 | Somatic cells | Has 23 pairs of chromosomes (Any cell other than a gamete) | 10 | |
| 5855937329 | Karyotype | An ordered display of the pairs of chromosomes from a cell | 11 | |
| 5855939397 | Homologous chromosome | The two chromosomes in each pair | 12 | |
| 5855941844 | Autosomes | The 22 pairs of chromosomes that do not determine sex | 13 | |
| 5855969678 | Diploid | Has two sets of chromosomes | 14 | |
| 5855972472 | Haploid | A gamete that contains a single set of chromosomes | 15 | |
| 5855975485 | Fertilization | The union of gametes | 16 | |
| 5855976883 | Zygote | The fertilized egg | 17 | |
| 5855979294 | Alternation of gerations | Plants and some algae exhibit life cycle cycles that include both diploid and haploid | 18 | |
| 5855996915 | Sporophyte | The diploid organism makes spores | 19 | |
| 5856001269 | Gametophyte | Each spore grows by mitosis into a haploid organism | 20 | |
| 5856013797 | Meiosis I | A stage that results in two haploid daughter cells with replicated chromosomes by separating homologous chromosomes | 21 | |
| 5856027240 | Meiosis II | A stage that results in four haploid daughter cells with unreplicated chromosomes by separating chromatids | 22 | |
| 5856039820 | Interphase | A phase where chromosomes are replicated to form sister chromatids | 23 | |
| 5856047508 | Prophase I | A phase where chromosomes begin to condense (occupies 90%) | 24 | |
| 5856054261 | Synapsis | Homologous chromosomes loosely pair up and are aligned gene by gene | 25 | |
| 5856065831 | Crossing over | Nonsister chromatids exchange DNA segmentts | 26 | |
| 5856068007 | Chiasmata | X-shaped regions where crossing over occurred | 27 | |
| 5856071170 | Metaphase I | A phase where tetrads line up at the metaphase plate, with one chromosome facing each pole and microtubules from each pole attach to the kinetochores | 28 | |
| 5856082596 | Anaphase I | A phase where pairs of homologous chromosomes seperate but sister chromatids remain attached at the centromere | 29 | |
| 5856096520 | Telophase I | A phase where each half of the cell has a haploid set of chromosomes | 30 | |
| 5856112532 | Cytokinesis | Occurs simultaneously with Telophase I and forms two haploid daughter cells | 31 | |
| 5856125197 | Prophase II | A phase where a spindle apparatus forms and chromosomes move toward the metaphase plate | 32 | |
| 5856134816 | Metaphase II | A phase where sister chromatids are arranged at the metaphase plate and the kinetochores of sister chromatids attach to microtubules | 33 | |
| 5856151693 | Anaphase II | A phase where the sister chromatids separate and move towards opposite poles | 34 | |
| 5856162241 | Telophase II | A phase where the chromosomes arrive at the opposite plates, nuclei form, and the chromosomes begin decondensing | 35 | |
| 5856172931 | Cytokinesis II | Separates the cytoplasm (the final separation) | 36 | |
| 5856190893 | Mutations | The original source of genetic diversity | 37 | |
| 5856204790 | Interdependent assortment of chromosomes | Each pair of chromosomes sorts maternal and paternal homologues into daughter cells independently of the other pairs | 38 | |
| 5856222829 | Recombinant chromosomes | The combination of genes inherited from each parent | 39 | |
| 5856228159 | Random fertilization | The fusing of any sperm with any ovum | 40 |
