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






2. 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.






3. Because of base pairing in DNA the amount of






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






5. The preserved remains or traces of an organism that lived in the past






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






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






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






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






10. Determined the complete double helical structure of DNA






11. Features that are superficially similar but have different modes of development






12. Proteins are made of...






13. How often a particular gene occurs in the population






14. Closely related species occupying different habitats - niches preventing them from interbreeding






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






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






17. Organism is preserved at very low temperatures. Preservation of both hard and soft parts can occur.






18. Speciation which does not involve a period of geographical separation






19. A body cell






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






21. The condition in which there is no change in allele frequencies from generation to generation (i.e. no evolution)






22. 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.






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






24. Cross where you cross unknown genotype with a recessive






25. Genes contain instructions for assembling






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






27. Process by which an organism is slowly turned to stone as the body is replaced by minerals.






28. A codon is made of...






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






30. An equilibrium in the occurence of two or more different froms within the same population usually caused by different allele combiinations of a gene






31. 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






32. 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






33. Change in a DNA sequence that affects genetic information






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






35. Three mRNA nucleotides that code for a specific amino acid






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






37. What is one benefit for having two strands of DNA?






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






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






40. Mutation where an extra base is added






41. Different alleles for a gene






42. Similar embryological structures in different species - such as gill slits - may demonstrate that these species share a common ancestor.






43. Physical characteristics of an organism based on its genotype. e.g. Plant that has a genotype of TT will have a phenotype of Tall.






44. Recognize and cut DNA at specific sequences usually palindromes






45. Pea plants






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






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






48. To create a recombinant DNA molecule - one would have to first cut two DNAs with creating before pasting them together






49. Building block of a protein






50. Trait evolves overtime; NO common ancestry