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Name _______________________________ Class __________________ Date _______________ Matching On the lines provided, write the letter of the definition of each term. I __________ 1. genetics a. likelihood that something will happen C _________ 2. trait b. individual whose two alleles are the same D _________ 3. hybrid c. specific characteristic G _________ 4. gene d. offspring of crosses between parents with different traits J __________ 5. allele e. the idea that only one of two alleles are passed on F__________ 6. gamete f. sex cell A _________ 7. probability g. factor that determines traits H _________ 8. Punnett square h. diagram showing possible gene combinations E _________ 9. Law of Segregation i. the scientific study of heredity B _________ 10. homozygous j. form of a gene Completion On the lines provided, complete the following sentences. Use the word bank below to assist in problems 11-15. homozygous heterozygous Law of Independent Assortment true-breeding genotype phenotype hybrid dominant gametes alleles recessive 11. Organisms that self-pollinate, producing offspring identical to themselves, are TRUE-BREEDING ________ 12. Although organisms with the same physical characteristics have the same PHENOTYPE ___________ , they might have different GENOTYPE ____________ , or genetic makeup. 13. According to the principle known as LAW OF INDEPENDENDT ASSORTMENT , genes that segregate independently do not influence each other’s inheritance. 14. DOMINANT ____________ alleles “cover up” the expression of ___RECESSIVE_______ alleles 15. A ___HYBRID___________results in the joining of female and male reproductive cells that contain different forms of a gene. Multiple Choice On the lines provided, write the letter of the answer that best completes the sentence or answers the question. B _________ 16. In what process do male and female reproductive cells join during sexual reproduction? a. segregation c. self-pollination b. fertilization d. cross-pollination Name _______________________________ Class ___________________ Date _______________ D _________ 17. Organisms that have identical alleles for a particular trait are a. heterozygous. c. diploid. b. polygenic. d. homozygous. C _________ 18. An organism such as a pea plant that has an allele for being tall and an allele for being short is a. true-breeding. c. heterozygous. b. homologous. d. homozygous. B _________ 19. Two organisms with the genetic make up of HH and Hh have the same a. eggs. c. sperm b. phenotype d. genotype D____________20. An individual with the genotype of AaBbCcDd would be able to produce _____ types of gametes. a. one c. four b. eight d. sixteen 34