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.
The term ' segmentation gene ' is a classification given to a broad class of genes that are further subdivided into three smaller classes of genes. Within the segmentation gene group, there are gap genes, pair-rule genes and segment polarity genes.They control development in this order.These segmentation genes control the development of segments, or small repeated regions of a body that make up specific structures. If you were to look at a fly embryo during development, you'd quickly notice these segments along their bodies.hey control development in this order. These segmentation genes control the development of segments, or small repeated regions of a body that make up specific structures. If you were to look at a fly embryo during development, you'd quickly notice these segments along their bodies.