Nursing

OB Final Study Guide Chapter 3 Genetics, Conception, Fetal Development, and Reproductive Technology o  30,000 genes in the human genome (organism’s complete set of DNA)  46 chromosomes; 22 homologous pairs of chromosomes and one pair of sex chromosomes  recessive genetic disorders  sickle cell anemia, cystic fibrosis, thalassemia, Tay-Sachs disease  carrier testing  identify individuals who carry one copy of a gene mutation that, when present in two copies ca...