lesson 4

• heredity - study of the passing of characteristics
• gregor mendel - father of genetics
• ernst heinrich haeckel - german zoologist
• fredrick meischer - material found in the nucleus
• genetics - study of heredity and genes
• 1905 - lethal genes
• 1910 - thomas hunt morgan
• 1913 - alfred sturtevan
• 1919 - thomas hunt morgan
• 1923 - arthhur edwin boycott
• homozygous - organism has two identical alleles of a particular trait
• heterozygous - pair of alleles differ because they came from parent with different traits
• dominant - shows trait
• recessive - does not show
• law of segregation - inherited characteristics depends on the gene pair
• the law of independent assortment - based on dihybrid crosses
• law of dominance - an offspring that was developed from crossbreeding