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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. Separates DNA by size






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






3. 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.






4. Selection for the ability to obtain a mate






5. Translation occurs in the...






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






7. Periods of little adaptive change






8. A small simple structure (as a fertilized egg) from which new tissue can develop into a complete organism. It is also a cell






9. Any preserved remains of an organism from the past. Usually found in sedimentary rock.






10. 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






11. 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.






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






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






14. Predicts the possible outcome of a genetic cross.






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






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






17. What happens during the process of translation






18. Is found in DNA






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






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






21. A body cell






22. Chromosomes are collections of many






23. The study relating the evolution of new charateristics to changes in the genes controlling development






24. 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






25. Process by which one species gives rise to two or more species






26. Dna moves during electrophoresis because of...






27. Organ no longer serves a function






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






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






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






31. Because of base pairing in DNA the amount of






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






33. Change in a DNA sequence that affects genetic information






34. 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






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






36. Cell division that produces reproductive cells or gamates.This occurs in the gonads (testicle and ovaries in animals) Here the chromosome number is halved the original amount. (each new cell has a haploid number = n) All daughter cells are not geneti






37. 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






38. 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.






39. A change or error in the DNA sequence






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






41. A DNA double helix is held together in the center by between nitrogenous bases






42. Molecules that join together to form DNA and RNA. Monomers that make up a nucleic acid






43. 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.






44. 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.






45. Movement of organisms ro of from a population






46. Another term for pure breeding






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






48. The independant evolution of similar traits - starting from a similar ancestral condition






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






50. Any agent that can cause a change in DNA