perinatal. relating to the period shortly before and after birth; the actual time varies between species. The last 10 to 15% of the pregnancy before parturition to the end of a comparable period after birth would cover present usage of the term. perinatal mortality. the percentage of animals in the danger period which die, as a ratio of the total number exposed.
Normal Gene Tumor Suppressor Gene Is nicknamed the Guardian of the Genome.. Can arrest the cell cycle, trigger apoptosis or senescence, and repair DNA. Chromosome 17 Cell Survival Produces a protein called tumor protein p53, which regulates cell division.
Genes are the basic unit in the study of genetics. Each gene contains the specific code relating to the function of a single protein. Genes combine to form specific DNA molecules. The nucleus of the cell of an organism contains chromatin, which is complex combination of proteins and DNA. When cell division occurs during reproduction, the chromatin forms with the DNA into a chromosome.