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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. A distinct population of a species that varies from other populations of the same species.






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






3. Situation in which allele frequencies remain constant






4. The sum total of an organism's requirements; its way of life






5. 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






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






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






8. Building block of a protein






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






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






11. Threadlike structure within the nucleus containing the genetic information that is passed from one generation of cells to the next






12. Trait evolves overtime; NO common ancestry






13. Ribosomal RNA; type of RNA that makes up part of the ribosome






14. 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.






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






16. Synonym for protein; chain of amino acids






17. One of the types of fossils made from hardened tree resin. Preserves both hard and soft parts.






18. Gradual evolution within a lineage






19. 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






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






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






22. Features that are superficially similar but have different modes of development






23. All the factors in an organism's surroundings that can potentially affect it






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






25. T or F a codon consist of three nucleotides






26. Hybrid is sterile so biologically unfit






27. A geographic gradient in the extent to which a character is developed in a species






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






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






30. The evolutionary process by which a species becomes better suited to its niche.






31. Uses metamorphic or igneous rock - calculates the age of an object by assessing the amount of radioactive element still present in the organism. Radioactive elements are slowly lost over time because of decay.






32. Speciation which does not involve a period of geographical separation






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






34. Two alternative forms of a gene e.g Tall vs Short






35. Disappearance of a species from all parts of its geographical range






36. 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.






37. Movement of organisms ro of from a population






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






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






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






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






42. Determined the complete double helical structure of DNA






43. What does DNA stand for...






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






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






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






47. Closely related species occupying different habitats - niches preventing them from interbreeding






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






49. 2 alleles for a character separate during the formation of gametes - so that each gamete only carriers one allele for each character

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