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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. Movement of alleles into or out of a population due to the migration of individuals to or from the population






2. The study of the past and present distribution of species.






3. Three dimensional shape of organism made from a mold. May be created with plaster or over time with minerals.






4. Reciprocal evolution in two species as a result of the selection pressure each imposes upon the other






5. You mate the unknown genotype with an organism showing the recessive trait. If any of the offspring show the recessive trait - the original unknown parent was heterozygous. If no recessive trats show up - the original parent was homozygous.






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






7. Different alleles for a gene






8. Evolutionary process in which a species or related species folllow different evolutionary paths to eventually become less related






9. Shows how the embryos of different groups resemble each other at particular stages. Similarities indicate groups may share a common ancestor






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






11. A trait that masks the expression of another trait






12. During transcription an RNA molecule is formed






13. Inherited feature that tends to prevent species from interbreeding with other species






14. Used radioactive sulfur and radioactive phosphorus to determine that DNA is the genetic material - by demonstrating that it is DNA that is injected by bacteriophages into bacterial cells during infection






15. The adaptive increase in pigmentation as a result of human - induced pollutants






16. Structures in different but related species that are derived from the same ancestral structure but now serve different purposes.






17. Organisms with a similar underlying structure - but different function. Example: bird - bat and dolphin 'arm'. Shows a common ancestral link.






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






19. Situation in which allele frequencies remain constant






20. Another name for a gene






21. Determined the complete double helical structure of DNA






22. The capacity of an individual of certain genotype to reproduce. It is usually equal to the proportion of the individual's genes in all the genes of the next generation






23. Visual expression of a trait






24. A base found in DNA (but not in RNA). This base pairs with Adenine.






25. A nucleotide of RNA is made of...






26. It means chromosomes are paired. One of each chromosome in a pair originates from the father and one from the mother. They affect the same trait - but don't necessarily cause the same expression of the trait.






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






28. Any agent that can cause a change in DNA






29. Geologic period that followed the Precambrian;means 'ancient life' - early life (570-286 million years ago); single cell organisms - shells - mollusks - rise of first vertebrates - rise of land plants - amphibians - insects - seed plants - and trees






30. The type of environment in which an organism or group normally lives or occurs






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






32. Is a sequence of DNA that codes for a protein and thus determines a trait. This is because the sequence of bases code for certain proteins.






33. Is found in DNA






34. Transcrition occurs in the...






35. Copying the code from DNA onto mRNA






36. DNA is made of...






37. Change to a chromosome in which part of the chromosome is repeated






38. The individuals choice of which mate they will choose. The choice is dependant on what traits the individual finds attractive. e.g some people will want their mates to be smart or pretty.






39. Change of an organism over time. This can be caused by changes in in habitat or need to adapt for survival.






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






41. A pairing where the parent plants differ in only one character.






42. Impression made from a organism in soft material such as sand or mud.






43. Selection acting against the extremes of a range of variation - resulting in resistance to change in allele frequencies






44. Genes contain instructions for assembling






45. The banding pattern of a persons DNA after being cut and run on gel is called






46. The environmental factors that favour certain phenotypes






47. The gradual changes in gene frequencies in a population due to random events






48. The independant evolution of similar traits - starting from a similar ancestral condition






49. 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.






50. Periods of rapid evolution punctuated by periods of little change






Can you answer 50 questions in 15 minutes?



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