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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. Trait evolves overtime; NO common ancestry






2. Structure present in an organism however does NOT have a known function. May link organisms with similar vestigial structures. Example: appendix - coccyx bone - whale leg bones.






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






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






5. Translation occurs in the...






6. When competition causes two closely related species to become more different in regions where their ranges overlap






7. How often a particular gene occurs in the population






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






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






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






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






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






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






14. Situation in which allele frequencies remain constant






15. Chromosomes are collections of many






16. DNA is made of...






17. The specific location of a gene on a chromosome






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






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






20. Pea plants






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






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






23. The offspring of a cross between two inbred lines within a single species. May also refer to the offspring of across between two species






24. 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.






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






26. Structures in different but related species that are derived from the same ancestral structure but now serve different purposes.






27. Which type of Rna functions as a blue print of the genetic code






28. Visual expression of a trait






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






30. A change or error in the DNA sequence






31. The banding pattern of a persons DNA after being cut and run on gel is called






32. Determined the concept of complementary base pairing






33. 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.






34. Copying the code from DNA onto mRNA






35. 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






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






37. Organ no longer serves a function






38. 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.






39. During transcription an RNA molecule is formed






40. One of the identical rods of a chromosome.






41. 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.






42. Science dealing with DNA and protein synthesis of living organisms. Manipulation of DNA.






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






45. DNA that is coiled around proteins






46. Another term for pure breeding






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






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






49. Selection for the ability to obtain a mate






50. Ribosomes are made of...