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CSET Genetics And Evolution

Subjects : cset, science, genetics
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Group of individuals of the same species that live in the same area






2. Populations that can interbreed with neighboring populations but not with populations separated by larger geographical distances






3. The inherited characteristic often masked by the dominant characteristic and not seen in an organism. e.g. Tt plant will still be tall. Where T is the dominant trait for tall and t is the recessive trait for small.






4. All the genes in a population. genes are added by reproduction and immigration and lost by death and emigration






5. DNA that is coiled around proteins






6. Transfer RNA; type of RNA that carries amino acids to the ribosome






7. Evolution of living things - based on evidence from the past and present.






8. Evolution of superficial phenotypic similarity of form as a result of similar selection pressures






9. 2 alleles for a character separate during the formation of gametes - so that each gamete only carriers one allele for each character

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10. A process where the organisms that have traits that aid in its survival (adaptive traits) will reproduce to pass that trait to futher generations thus increasing the frequency of that trait in the population. Vice versa traits that reduce the chance






11. Describes the existence of a prezygotic reproductive barrier between two species as a result of them occupying or breeding in different habitats within the same general geographical area






12. Periods of little adaptive change






13. Form of reproductive isolation in which two populations reproduce at different times






14. Heteros have a phenotype tintertmediate b/t phenotypes of the 2 homoz






15. Of a cell or organism having two sets of homologous chromosomes or twice the haploid number






16. Dna moves during electrophoresis because of...






17. Change in allele frequencies as a result of the migration of a small subgroup of a population






18. DNA is made of...






19. Large - scale evolutionary changes that take place over long periods of time






20. A taxon originating from and including a single common ancestor






21. Individual that is heterozygous for two traits; shows the phenotype governed by the dominant alleles but carries the recessive alleles






22. A DNA double helix is held together in the center by between nitrogenous bases






23. Visual expression of a trait






24. A DNA strand that has the bases CTAATGT forms a complete complementary double helix with






25. Natural selection that causes the frequency of a particular allele to move in one direction






26. Found only in that country






27. A change in the base sequence of a gene






28. Synonym for protein; chain of amino acids






29. A genetic crosses that involve one trait. e.g TT plant crossed with tt plant has offspring who are heterozygous Tt.






30. How many codons are needed to specify three amino acids






31. Copying the code from DNA onto mRNA






32. A process that results in an allele having a different probability of remaining in the gene pool compared with that of another allele






33. Determined the concept of complementary base pairing






34. Method of replication that implies that each new strand of DNA is half original and half new






35. An organism that has characteristics resulting from chromosomal alteration. This is a result of crossing over of the chromosomes during Meiosis - mutations and random segregation.






36. The region of the chromosome that holds the two sister chromatids together during mitosis






37. Organisms with similar functions - but different underlying structure. Example: bird and insect wing. These structures do NOT show a common ancestral link.






38. Condition in which an organism has extra sets of chromosomes






39. A copy of a gene is made during a process called this






40. Is a base found in DNA and RNA. This base pairs with Cytosine in DNA






41. A fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found






42. When competition causes two closely related species to become more different in regions where their ranges overlap






43. All the factors in an organism's surroundings that can potentially affect it






44. Evolution resulting from small specific genetic changes that can lead to a new subspecies






45. Proteins are made of...






46. Disappearance of a species from all parts of its geographical range






47. How often a particular gene occurs in the population






48. Is any chromosome that is not a sex chromosome.






49. Process by which a ribosome uses the code on mRNA to make proteins






50. The signal on a mRNA molecule that designates the end of the coding sequence is called the...