Topics that we will learn in this lecture: understanding microevolution. Focuses on how evolution works at level of phenotypes,genes, and populations. Somatic cells: most cess in body(except sex cells) Gametes: sex cells (sperm and ovum (egg)) Cytoplasm: complex mix of membranes, molecules and tiny structures called organelles. Nucleus: contains hereditary material, known as chromosomes. Chromosomes: paired rod shapes structures in cell nucleus containing genes that transmit traits from generation to generation. Deoxyribonucleic acid: nucleic acid used to store genetic information that codes for the synthesis of proteins. Four bases: adenine (a), guanine (g), cytosine (c),& thymine (t) Nasa (2011) reported that meteorites found on earth, contain nucleases ( such as guanine and. Thursday, september 29, 2016 adenine) that may have been formed in outer space. Rna (ribonucleic acid) molecules: dictate synthesis of proteins that preform a wide variety of functions in body.