Chromosome count and appearance are studied through karyotype analysis. Karyotype includes chromosome length, centromere position, and banding patterns. Preparation and study of karyotypes is part of cytogenetics
Humans evolved from chimpanzees 8-4 million years ago. Modern humans emerged in Africa 300,000 years ago. First behavioral modernity appeared 160,000-60,000 years ago. Humans migrated out of Africa, replacing archaic populations
Rh blood group contains proteins on red blood cell surface. System consists of over 50 antigens, with D, C, c, E, and e being most prominent. Rh(D) status described as positive (+) or negative (-) after ABO type. Two main nomenclature systems exist: Fisher-Race (CDE) and Wiener (Rh-Hr)
Two-year-old height doubling method is easiest but least accurate. Mid-parental height method uses formula with 4-inch margin of error. CDC growth charts compare child's height with peers
Heterozygous means two different alleles at the same chromosome locus. Humans are diploid organisms with two alleles inherited from each parent. Alleles can be dominant (expressive with one copy) or recessive (recessive with two)
Quiz predicts future height based on 10 questions. Results range from 3 feet to over 4 feet tall. Quiz is based on genetics and lifestyle factors