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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. 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






2. 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.






3. Which structure contains anticodons






4. 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.






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






6. When a few individuals become isolated from a larger population - this smaller group may establish a new population whose gene pool is different from their source population.






7. 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.






8. Determined the complete double helical structure of DNA






9. Predicts the possible outcome of a genetic cross.






10. The molecules responsible for bringing amino acids to the ribosome during protein synthesis are






11. 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






12. 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






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






14. Used x ray cyrstallography to create an image of DNA






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






16. Even if the gametes of the two species meet - fertilization does not occur






17. 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.






18. Form of reproductive isolation in which structural differences in the anatomy of reproductive organs prevent sperm transfer between individuals of different species






19. Process by which a ribosome uses the code on mRNA to make proteins






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






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






22. Selection for the ability to obtain a mate






23. Chromosomes are collections of many






24. Organ no longer serves a function






25. Is any chromosome that is not a sex chromosome.






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






27. 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






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






29. A codon is made of...






30. Any agent that can cause a change in DNA






31. Visual expression of a trait






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






33. Evolution of the earth - which is hypothesized to have been formed over 4.6 billion years ago.






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






35. Independent segregation of genes during the formation of gametes






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






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






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






39. Selection acting against the middle of a range of variation






40. A change or error in the DNA sequence






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






42. The formation of new species as a result of evolution






43. Layers of compressed sedimentary rock demonstrate the order or sequence at which events occurred. Cannot delineate the exact point of time - but is able to distinguish the order of events.






44. The comparison of the structures of different organisms






45. Describes the existence of a prezygotic reproductive barrier between two species as a result of them occupying or breeding in different habitats within the same general geographical area






46. Evolution of living things - based on evidence from the past and present.






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






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






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






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