Unit 3

4. the form of a trait that has two different alleles
5. type of asexual reproduction in which a cell equally divides including genetic material
7. type of cell with a true nucleus containing DNA in the form of chromosomes
8. cellular process of engulfing food or particles
12. single-stranded nucleic acid with ribose sugar and nitrogenous bases of A, G, C, and U
13. defined as a group of organisms with similar structure, function, and behavior
14. deoxyribonucleic acid is the heredity material of most organisms
16. the form of a trait in which the two alleles are similar
20. trait or allele dominated by the dominant allele, this trait only expressed if both alleles are recessive
23. Y-shaped protein called immunoglobulin (Ig)
25. an independent, self-replicating, circular piece of DNA
26. results from the introduction of antibodies from another person or animal
27. represents the genetic factors of the phenotype

1. the science of naming and classifying organisms
2. resistance developed by an individual that helps to combat a pathogen
3. theory states that all living organisms are composed of cells
6. antigens, or parts of antigens, that are killed or weakened and do not cause infection or disease
8. cell that lacks a membrane-bound nucleus
9. response to a pathogen in which the immune system begins making or releasing antibodies
10. three nucleotides on the mRNA that code for an amino acid
11. segment of DNA that determines an organism’s characteristics
15. alteration that can occur in DNA
17. the external appearance of a trait
18. branch of biology that deals with the study of inheritance of traits
19. transmission of traits from parents to their offspring
21. submicroscopic, obligate intracellular parasites
22. traits or alleles suppress the recessive trait
24. one of two or more alternative forms of a gene on a chromosome