FRHD 1010 Chapter Notes - Chapter 2: Primitive Reflexes, Preterm Birth, Human Genome Project

• School: University of Guelph
• Department: Family Relations and Human Development
• Course: FRHD 1010
• Professor: Susan Chuang

Document Summary

Each person starts life as a single cell, called a zygote: each is unique, yet contains genes passed down for thousands of years. The first stages of development are compelling of both the universal and unique characteristics of each human being. All living things composed of cells that promote growth and sustain life according to their molecules of dna: each molecule of dna is called a chromosome. Chromosomes contain units of instructions called genes. Additional dna and rna surround each gene: through methylation, this material enhances, transcribes, connects, Continues throughout life, and can alter a gene"s expression empowers, silences, and alters genes even after birth. With one exception, every cell in each person normally has copies of that person"s 46 chromosomes, arranged in 23 pairs: that exception is the reproductive cell, called a gamete. Each gamete, sperm in a man, ovum in a woman, has only 23 chromosomes, one from each of a person"s 23 pairs.