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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. Name for oism with one dominant and one recessive allele






2. Gene

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






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






5. A pairing where the parent plants differ in only one character.






6. DNA that is coiled around proteins






7. Dna moves during electrophoresis because of...






8. 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.






9. 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.






10. A point of overlap of paired chromatids at which fusion and exchange of genetic material (crossing over) occurs during prophase I of meiosis.






11. A nucleotide of RNA is made of...






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






13. The number of times an allele appears in a population






14. Organisms with a similar underlying structure - but different function. Example: bird - bat and dolphin 'arm'. Shows a common ancestral link.






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






16. Separates DNA by size






17. 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.






18. Movement of organisms ro of from a population






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






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






21. One of the identical rods of a chromosome.






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






23. Messenger RNA; type of RNA that carries instructions from DNA in the nucleus to the ribosome






24. Cross where you cross unknown genotype with a recessive






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






26. A trait that masks the expression of another trait






27. The environmental factors that favour certain phenotypes






28. 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.






29. The movement of individuals into an area






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






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






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






33. 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.






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






35. How often a form of a gene appears in a gene pool






36. Relatively rapid proliferation from an ancestral type into new types which fill a diversity of ecological niches






37. Human - like species that existed millions of years ago as witnessed through fossil evidence.






38. The movement of genes between populations as a result of mating of migration






39. A mutation in which one nucleotide is replaced by another nucleotide






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






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






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






43. Populations that can interbreed with neighboring populations but not with populations separated by larger geographical distances






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






45. A codon is made of...






46. Change in allele frequencies as a result of the migration of a small subgroup of a population






47. Type of rock made from small pieces of other rocks and organisms pressed together. Source of fossil preservation. Limited radioactive or absolute dating potential.






48. 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






49. Another name for a gene






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







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