Structure of an Atom All matter is composed of atoms, which are the smallest parts of an element that can take place in chemical reactions Atoms are mostly made up of empty space around a very smal...
Recombinant DNA Technology Recombinant DNA The genetic code is universal, meaning that almost every organism uses the same four nitrogenous bases – A, T, C & G. There are a few exceptions The g...
Genome Sequencing Projects A genome contains all of the genes within an organism Advances in technology have allowed scientists to map and sequence the genes within an organism's genome Genome sequ...
Totipotent Cells A stem cell is a cell that can divide (by mitosis) an unlimited number of times Each new cell that is produced when a stem cell divides has the potential to remain a stem cell or t...
Gene Mutations A gene mutation is a change in the sequence of base pairs in a DNA molecule that may result in an altered polypeptide Mutations occur continuously and spontaneously Errors in the DNA...
The Definition of a Community Species do not exist by themselves in their own isolated environment, they interact with other species forming communities A community can be defined as: Multiple popu...
Genetic Variation Phenotype variation The observable characteristics of an organism are its phenotype Phenotypic variation is the difference in phenotypes between organisms of the same speci...
Species Exist in Populations A species can be defined as a group of similar organisms that can reproduce to give fertile offspring Organisms of the same species have the same number of chromosomes ...
Key Terms in Genetics Genes & alleles The DNA contained within chromosomes is essential for cell survival Every chromosome consists of a long DNA molecule which codes for several differe...
