Living systems store, retrieve, transmit, and respond to information essential to life processes.
Enduring understanding 3.A: Heritable information provides for continuity of life.
3.A.1: DNA, and in some cases RNA, is the primary source of heritable information.
3.A.2: In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization.
3.A.3: The chromosomal basis of inheritance provides an understanding of the pattern of passage (transmission) of genes from parent to offspring
3.A.4: The inheritance pattern of many traits cannot be explained by simple Mendelian genetics.
Enduring understanding 3.B: Expression of genetic information involves cellular and molecular mechanisms.
3.B.1: Gene regulation results in differential gene expression, leading to cell specialization
3.B.2: A variety of intercellular and intracellular signal transmissions mediate gene expression.
Enduring understanding 3.C: The processing of genetic information is imperfect and is a source of genetic variation.
3.C.1: Changes in genotype can result in changes in phenotype.
3.C.2: Biological systems have multiple processes that increase genetic variation
3.C.3: Viral replication results in genetic variation, and viral infection can introduce genetic variation into the hosts.