Heredity Study Guide 1. Two similar chromosomes which carry the genes for the same traits, one of which is inherited from the father and one of which is inherited from the mother are called what? 2. What type of cells are diploid? 3. What type of cells are haploid? 4. Two heterozygous individuals, both Tt, are crossed, what would be the phenotypic ratio of Tall to short? T = tall, t = short, T is dominant. 5. The fusion of gametes is called what? 6. What is an organism’s genome? 7. Different forms of the same gene on homologous chromosomes are called what? 8. If an individual shows a recessive trait, what is his genotype for that trait? 9. In a heterozygous cross (Tt x Tt), what is the probability of a dominant phenotype? 10. An identical genetic copy of an organism is called a what? 11. What type of reproduction is best when the environment is stable? 12. What type of reproduction is best when an environment is unfavorable and changing? 13. If R = red and r = white, what color would a Rr individual be? Remember, R is dominant. 14. Both alleles are expressed completely describes what pattern of inheritance? 15. both alleles are expressed, but not completely describes what pattern of inheritance? 16. What does it mean for a trait to be sex linked? 17. Be able to match DNA with RNA and DNA with DNA. 18. What are the four major differences between DNA and RNA?