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






2. It means chromosomes are paired. One of each chromosome in a pair originates from the father and one from the mother. They affect the same trait - but don't necessarily cause the same expression of the trait.






3. DNA that is coiled around proteins






4. Periods of little adaptive change






5. Process in which DNA is duplicated






6. You mate the unknown genotype with an organism showing the recessive trait. If any of the offspring show the recessive trait - the original unknown parent was heterozygous. If no recessive trats show up - the original parent was homozygous.






7. A limb with five digits (fingers)






8. The region of the chromosome that holds the two sister chromatids together during mitosis






9. A base found in DNA (but not in RNA). This base pairs with Adenine.






10. Similar DNA sequences or protein structures (such as hemoglobin) may link different species to a similar ancestor.






11. Evolution of superficial phenotypic similarity of form as a result of similar selection pressures






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






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






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






15. Describes a cell - nucleus - or organism that has only one set of unpaired chromosomes






16. A nucleotide of RNA is made of...






17. Change to a chromosome in which a fragment of the chromosome is removed






18. Physical characteristics of an organism based on its genotype. e.g. Plant that has a genotype of TT will have a phenotype of Tall.






19. How often a particular gene occurs in the population






20. A combining of genes or characters different from what they were in the parents






21. 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.






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






23. A trait that masks the expression of another trait






24. Any agent that can cause a change in DNA






25. Synonym for protein; chain of amino acids






26. Ribosomes are made of...






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






28. Independent segregation of genes during the formation of gametes






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






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






31. Because of base pairing in DNA the amount of






32. Evolutionary process in which a species or related species folllow different evolutionary paths to eventually become less related






33. 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.






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






35. Gene

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36. 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.






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






38. A copy of a gene is made during a process called this






39. Copying the code from DNA onto mRNA






40. Trait where heterozygous is a blending of two alleles






41. Separates DNA by size






42. Proteins are made of...






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






44. The backbone of DNA consist of...






45. Form of reproductive isolation in which tere are differences in species courtship behavior






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






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






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






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






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