Reports of reactions to food additives have included the following: 1  Skin urticaria/angioedema. atopic dermatitis. 2  Gastrointestinal abdominal pain. nausea/vomiting. 3  Respiratory asthma symptoms. cough.  Musculoskeletal muscle aches. joint 1  aches. Neurologic behavior and mood changes. attention deficit and hyperactivity disorder.  Cardiac palpitations.
DNA replicates by the semiconservative model of replication. This model states that during replication of double stranded DNA, the two strands separate and each separate strand is then used as a template to make a new strand.
Previous to replication, a germ cell contains two copies of each chromosome, a maternal copy, and a paternal copy. The maternal and paternal homologues represent the maternal and paternal genetic contributions to each cell and ensure that each cell has a 50% genetic make-up coming from each parent. These two chromosomes are independent but very similar, and are termed homologues of each other. DNA replication occurs in the same fashion as it does during mitosis. After replication, the homologues are doubled, and each chromosome now has a homologous pair. Figure %: DNA replication. After replication, the maternal and paternal homologues remain closely associated with their copy as sister chromatids.