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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. 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.






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






3. Group of individuals of the same species that live in the same area






4. 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.






5. A body cell






6. Hybrid is sterile so biologically unfit






7. T or F A cloned organism has the same proteins as another organism






8. Consists of all genes - including all the different alleles - that are present in a population






9. Separation of species or populations so that they cannot interbreed and produce fertile offspring






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






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






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






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






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






15. Actual remains of an organism such as bones - teeth - shells - etc.






16. Situation in which allele frequencies remain constant






17. A change in the base sequence of DNA; the ultimate source of new alleles






18. 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.






19. How often a particular gene occurs in the population






20. Is a trait that is more expressed than another trait. Is written in capital letters for Genotype. E.g Tall genotype is TT or Tt where T is the allele for tall trait and t is the trait for small. T will be expressed more.






21. The structure on a tRNA molecule that allows it interact with an mRNA molecule






22. Another term for pure breeding






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






24. Transcrition occurs in the...






25. Two alternative forms of a gene e.g Tall vs Short






26. A combining of genes or characters different from what they were in the parents






27. Natural disaster eliminates most of the population - members left contribute the alleles for the new population.






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






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






30. A group of organisms of the same species occupying a given area.






31. Change to a chromosome in which a fragment of the chromosome is removed






32. Change in a DNA sequence that affects genetic information






33. Chromosomes are collections of many






34. It is the time from when the Earth formed and simple life - forms evolved (and it is the longest era)






35. 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






36. Proteins are made of...






37. Is a base found in DNA and RNA. Cytosine pairs with Guanine in DNA






38. Different alleles for a gene






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






40. A type of barrier between species; the species remain isolated because male and femal gametes of the different species cannot fuse - or they die before they unite.






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






42. Embryos of similar organisms have very similar early development indicating similar DNA at work






43. Nucleotides that control which amino acids are added during protein synthesis






44. The movement of individuals into an area






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






46. Breeding organisms with specific traits in order to produce offspring with identical traits






47. One of the types of fossils made from hardened tree resin. Preserves both hard and soft parts.






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






49. The enzyme that binds to the promoter region of a gene during transcription is called...






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.