Genetics test vocabulary Review Name: _________________ Class: ________ 1. Gregor _____________, the "father of genetics" 2. The principle of _______________ and recessiveness. 3. The outward expression or appearance: _______________ 4. The genetic make-up of two alleles (the genetic make-up or an organism (Tt)) : _______________ 5. A cross that involves ONE pair of contrasting traits: _______________ 6. Cross that involves parents that differ in TWO traits. _______________ 7. The study of heredity: ________________ 8. An alternate form of a gene: _______________ 9. Having non identical alleles (not pure; ex. Aa): ________________ 10. Having identical alleles (pure, ex. AA): _________________ 11. Square used to determine probability and results of cross: ______________ 12. The allele that is masked or covered up by the dominant allele: ______________ 13. The plants Mendel did his studies on: ________________ 14. The likelihood that an event will happen: ____________________ 15. Gregor Mendel proposed two laws: 1) Law of _____________________________ states that alleles separate when gametes are formed 2) Law of _____________________________ states that ___________________________________ _________________________________________________________________________________ __________________________________________________________________________________ ------------------------------------------------------------------------------------------------------------------------------------------------------ ANSWER KEY 1. Gregor _____Mendel__________, the "father of genetics" 2. The principle of _dominance_______ and recessiveness. 3. The outward expression or appearance: ________phenotype_______ 4. The genetic make-up of two alleles (the genetic make-up or an organism (Tt)) : _______genotype_________ 5. A cross that involves ONE pair of contrasting traits: ____monohybrid_____________ 6. Cross that involves parents that differ in TWO traits. __dihybrid___ 7. The study of heredity: _____genetics____________ 8. An alternate form of a gene: ____allele__________ 9. Having non identical alleles (not pure; ex. Aa): __heterozygous___ 10. Having identical alleles (pure, ex. AA): _homozygous_________ 11. Square used to determine probability and results of cross: punnett 12. The allele that is masked or covered up by the dominant allele: ___ recessive___________ 13. The plants Mendel did his studies on: ______pea_______ 14. The likelihood that an event will happen: _________ probability_____________ 15.Gregor Mendel proposed two laws: 1) Law of _____segregation_______ states that alleles separate when gametes are formed 2) Law of _____independent Assortment _____ states that separate genes for separate traits are passed independently of one another from parents to offspring.