FRHD 1010 Chapter Notes - Chapter 2: Single-Nucleotide Polymorphism, Egg Cell, Prenatal Development
12 Oct 2016
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Document Summary
Everyone starts life as a single cell, called a zygote. The single cell that is formed from the fusing of two gametes, a sperm and an ovum. Every zygote is different and contains genes that have been passed down for many years. Dna (deoxyribonucleic acid) all living things are composed of this, as well as molecules. The molecule that contains the chemical instructions for cells to manufacture various proteins. One of the 48 molecules of dna that each cell of the human body contains and that, together, contain all the genes. A small section of a chromosome the basic unit for the transmission of heredity. A gene consists of a string of chemicals that provide instructions for the cell to manufacture certain proteins. Additional dna or rna surround each gene. Methylation material enhances, transcribes, connects, empowers, silences and alters genes. Methylation continues throughout life and alters expression after the person is born.
