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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. The reduction of a population - typically by a natural disaster - such that the surviving population is no longer genetically representative of the original population.






2. A change or error in the DNA sequence






3. Copying the code from DNA onto mRNA






4. When F1 is fully fertile but F2 has low fertility (rice - cotton)






5. 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






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






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






8. shape of a DNA molecule formed when two twisted DNA strands are coiled into a springlike structure and held together by hydrogen bonds between the bases.






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






10. Synonym for protein; chain of amino acids






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






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






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






14. Building block of a protein






15. Change in a DNA sequence that affects genetic information






16. Change to a chromosome in which a fragment of one chromosome attaches to a nonhomologous chromosome






17. Is the evolutionary process whereby a population becomes better suited to its habitat






18. Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest






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






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






21. 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.






22. Selection for the ability to obtain a mate






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






24. Movement of organisms ro of from a population






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






26. Era of recent life that began about 66 million years ago and continues today; includes the first appearance Hominids






27. Of a cell or organism having two sets of homologous chromosomes or twice the haploid number






28. Recognize and cut DNA at specific sequences usually palindromes






29. 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.






30. T or F If a nucleic acid contain uracil it is DNA






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






32. Reciprocal evolution in two species as a result of the selection pressure each imposes upon the other






33. Trait where heterozygous is a blending of two alleles






34. A taxon originating from and including a single common ancestor






35. 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.






36. What happens during the process of translation






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






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






39. The specific location of a gene on a chromosome






40. 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.






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






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






43. The study of the past and present distribution of species.






44. Another term for pure breeding






45. Type of sympatric speciation that occurs when a new species is formed because of a change in microhabitats






46. An equilibrium in the occurence of two or more different froms within the same population usually caused by different allele combiinations of a gene






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






48. Ribosomes are made of...






49. process in which homologous chromosomes exchange portions of their chromatids during meiosis.






50. 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