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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. Visual expression of a trait






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






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






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






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






6. Is found in DNA






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






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






9. A group of organisms whose members are sufficiently alike to be able to reproduce and produce fertile offspring and who are unable to reproduce with other such groups






10. Cell division in which the nucleus divides into nuclei containing the same number of chromosomes. Mitosis involves growth and repair and occurs in the body cells.






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






12. T or F a codon consist of three nucleotides






13. Found only in that country






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






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






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






17. Features of different species tat are similar in function but not necessarily in structure and in which the similarity is not the result of common ancestry






18. Separates DNA by size






19. A trait that masks the expression of another trait






20. Translation occurs in the...






21. Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest






22. Situation in which allele frequencies remain constant






23. A model for the evolution of different froms over a long period of time but with only slight chchanges occring between successive generations






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






25. shape of a DNA molecule formed when two twisted DNA strands are coiled into a springlike structure and held together by hydrogen bonds between the bases.






26. 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.






27. Any indirect evidence of life preserved as an impression in rock; trails - footprints - tracks - burrows - and bite marks






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






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






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






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






32. Dna moves during electrophoresis because of...






33. The final product of transcription is...






34. Term used to refer to an organism that has two different alleles for the same trait. e.g Tt is the heterozygous genotype for Tall.






35. An episode of large - scale extinction affecting many different groups of organisms within a short period of time






36. Hybrid is sterile so biologically unfit






37. Genes contain instructions for assembling






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






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






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






41. Is the genetic makeup of an organism (TT or Tt) ; All the combinations of genes you have for a certain trait.






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






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






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






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






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






47. When F1 is fully fertile but F2 has low fertility (rice - cotton)






48. Building block of a nucleic acid (DNA and RNA)






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






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







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