* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project
What GENETICS is? Some defines says that it is the study of heredity But heredity phenomena were of interest to humans long before biology or genetics existed as the disciplines that we know today Genetics as a set of principles and analytical procedures did not begin until the 1860s, when Augustinian monk named Mendel performed a set of experiments that pointed to the existence of biological elements that we now call GENES The word genetics comes from the word “gene”, and genes are the focus of the subject So we can say that genetics: The study of gene structure and action and the patterns of inheritance of traits from parent to offspring. What is a gene? A gene is a section of the (DNA) deoxyribonucleic acid Why study genetics? There are two basic reasons: 1. Genetics occupies a pivotal position in the entire subject of biology. Therefore, for any serious student of plant, animal, or microbial life, an understanding of genetics is essential. 2. Genetics, like no other scientific discipline, is central to numerous aspects of human affairs. It touches our humanity in many different ways. Indeed, genetic issues seem to surface daily in our lives, and no thinking person can afford to be ignorant of its discoveries. The Cell A general characteristic of cells is their microscopic size. While there are a few exceptions—the marine alga Acetabularia can be up to 5 centimeters long—a typical eukaryotic cell is 10 to 100 micrometers. Most bacterial cells are only 1 to 10 micrometers in diameter. Hooke observed compartments. a honeycomb of tiny, empty He called the compartments in the cork cellulae (Latin, “small rooms”), and the term has come down to us as cells. The cell theory includes the following three principles: 1. All organisms are composed of one or more cells, and the life processes of metabolism and heredity occur within these cells. 2. Cells are the smallest living things, the basic units of organization of all organisms. 3. Cells arise only by division of a previously existing cell. Before we start, did you know…. Humans are 99.9% genetically identical – only 0.1% of our genetic make-up differs. Our genes are remarkably similar to those of other life forms. For example, we share 98% of our genes with chimpanzees, 90% with mice, 85% with zebra fish, 21% with worms, and 7% with a simple bacterium such as E. coli.