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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. Structure present in an organism however does NOT have a known function. May link organisms with similar vestigial structures. Example: appendix - coccyx bone - whale leg bones.






2. 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.






3. A distinct population of a species that varies from other populations of the same species.






4. During transcription an RNA molecule is formed






5. In the event of a sperm fertilizing an egg of another species - mechanisms that prevent result being fruitful






6. 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.






7. Name for oism with one dominant and one recessive allele






8. Mating of an individual of unknown genotype but dominant phenotype w/ a homozygous recessive individual






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






10. T or F If a nucleic acid contain uracil it is DNA






11. These prevent fertilization between species e.g. diff breeding season - mating behaviour






12. Is a base found in DNA and RNA. In DNA its partner is Thymine. In RNA its partner is Uracil






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






14. A type of natural selection in which genetic diversity decreases as the population stabilises on a particular trait value






15. Selection against one end of a range of variation - resulting in a progressive change in allele frequency






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






17. Copying the code from DNA onto mRNA






18. The evolutionary history/geneology of a group of organisms (a tree thingy)






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






20. A type of protein molecule found in the chromosomes of eukaryotic cells but not prokaryotic cells






21. Ribosomes are made of...






22. Which type of Rna functions as a blue print of the genetic code






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






24. When zygote does not complete development or is physically weaker than normal






25. Describes the isolation of a physical barrier e.g. body of water (ocean) or mountains






26. A nucleotide of RNA is made of...






27. The complete genetic material contained in an individual






28. Process in which DNA is duplicated






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






30. A body cell






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






32. The backbone of DNA consist of...






33. Term used to refer to an organism that has two identical alleles for a particular trait. e.g TT is the homozygous genotype for Tall.






34. Transcrition occurs in the...






35. Is active during transcription






36. A geographic gradient in the extent to which a character is developed in a species






37. A population partially isolated from other populations of the same species






38. A unique combination of traits that are passed down from one generation to another.






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






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






41. Uses metamorphic or igneous rock - calculates the age of an object by assessing the amount of radioactive element still present in the organism. Radioactive elements are slowly lost over time because of decay.






42. Human - like species that existed millions of years ago as witnessed through fossil evidence.






43. Selection for the ability to obtain a mate






44. An ancestor that two or more descendants have in common






45. The sum total of an organism's requirements; its way of life






46. How often a form of a gene appears in a gene pool






47. Mating of 2 oism that differ in 2 characters






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






49. An evolutionary 'branch' and its daughter 'twigs'






50. When chromosome is changed by radiation and chemicals - results a permanent structural change in the chromosome - which will no longer be able to pair with its homologous pair. Eg - deletion - duplication - inversion and translocation.