| A | B |
| isotonic | equal concentrations both inside and outside the cell |
| inversion | a section of chromosome breaks off, changes direction, and recombines in the original chromosome |
| independent variable | conditions that will be changed during the experiment |
| independent assortment | during meiosis, the random separating of homologous pairs of chromosomes |
| hypotonic | a higher concentration of solute inside the cytoplasm than outside the cel |
| hypothesis | a scientific guess about the outcome of an experiment |
| hypertonic | a scientific guess about the outcome of an experiment |
| human genome project | a project to identify all human genes, especially those responsible for particular traits, including diseases |
| homozygous | both alleles are the same |
| homologous structures | similar body parts found in different species |
| homologous chromosomes | paired chromosomes that separate during meiosis |
| homeostasis | ability or tendency of a cell or organism to maintain internal equilibrium |
| heterozygous | possessing two different alleles for a particular trait |
| heterotroph | organism that must obtain its energy from the food it consumes |
| heredity | the passing of genes and traits from one generation to the next |