FRHD 1010 Chapter Notes - Chapter 2: Artificial Insemination, Collectivism, Amniocentesis

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

Document Summary

Nearly all cells in humans have 46 chromosomes in 23 pairs. Chromosome: sausage shaped structure in the nucleus of cells, containing genes, which are paired, except in reproductive cells. Dna (deoxytiboynucleic acid) long strand of cell material that stores and transfers genetic information. Genes: segment of dna containing coded instructions for the growth and functioning of the organism. There are about 23,000 genes in our 46 chromosome, the total human genome is about 3 billion nucleotide pairs. Genome: entire store of organism"s hereditary information. Phenotype: organism"s actual characteristics, derived from genotype. Allele: on a pair of chromosomes, each of two forms of a gene. Only the dominant gene influences the phenotype. Polygenic inheritance: expression of phenotypic characteristics due to the interaction of. Incomplete dominance: phenotype is influenced by both dominant and recessive gene multiple genes. Beginning in 1990, project engaged a team in the goal of describing the chemical features of every gene in the human genome.