| Blastocyst - The modified blastula that is characteristic of placental mammals. |
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| Chromosomes - A threadlike linear strand of DNA and associated proteins in the nucleus of eukaryotic cells that carries the genes and functions in the transmission of hereditary information. |
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| Dormant - In a condition of biological rest or inactivity characterized by cessation of growth or development and the suspension of many metabolic processes. |
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Embryo - An organism in its early stages of development, especially before it has reached a distinctively recognizable form.
Endangered - To threaten with extinction.
Enucleated - Lacking a nucleus.
Enzymes - Any of numerous proteins or conjugated proteins produced by living organisms and functioning as biochemical catalysts. |
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| Genetic - Of or related to genes: A hereditary unit consisting of a sequence of DNA that occupies a specific location on a chromosome and determines a particular characteristic in an organism. Genes undergo mutation when their DNA sequence changes. |
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Hereditary - Transmitted or capable of being transmitted genetically from parent to offspring.
Human genome project - An international research effort to map and identify the role of all genes in the human genome. |
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| Implanted - To become attached to and embedded in the uterine lining. |
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| Micropipette - A very small pipette used in microinjection. |
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Parthenogenesis - A form of reproduction in which an unfertilized egg develops into a new individual, occurring commonly among insects and certain other arthropods.
Plasmid - A circular, double-stranded unit of DNA that replicates within a cell independently of the chromosomal DNA. Plasmids are most often found in bacteria and are used in recombinant DNA research to transfer genes between cells. |
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| Surrogate - One that takes the place of another; a substitute. |
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| Transgenic - Of, relating to, or being an organism whose genome has been altered by the transfer of a gene or genes from another species or breed. |
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| Yeast - Any of various unicellular fungi of the genus Saccharomyces, especially S. cerevisiae, reproducing by budding and from ascospores and capable of fermenting carbohydrates. |
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| Zoologists - The branch of biology that deals with animals and animal life, including the study of the structure, physiology, development, and classification of animals. |
