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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. How many codons are needed to specify three amino acids






2. Separates DNA by size






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






4. Identical alleles for a gene






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






6. Embryos of similar organisms have very similar early development indicating similar DNA at work






7. 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.






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






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






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






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






12. 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.






13. Deoxyribonucleic acid carries the genetic code for the proper functioning of an organism. It is composed of 5 carbon sugar (deoxyribose) four bases Adenine - Thymine - Cytosine and Guanine. the sugar is bonded to a phosphate group. This forms a long






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






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






16. The backbone of DNA consist of...






17. Ribosomes are made of...






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






19. It is the time from when the Earth formed and simple life - forms evolved (and it is the longest era)






20. Trait evolves overtime; NO common ancestry






21. Different alleles for a gene






22. Visual expression of a trait






23. Transcrition occurs in the...






24. T or F a codon consist of three nucleotides






25. Predicts the possible outcome of a genetic cross.






26. The formation of new species as a result of evolution






27. The type of environment in which an organism or group normally lives or occurs






28. The environmental factors that favour certain phenotypes






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






30. A DNA strand that has the bases CTAATGT forms a complete complementary double helix with






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






32. Group of similar organisms that can breed and produce fertile offspring






33. T or F A cloned organism has the same proteins as another organism






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






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






36. Shows how the embryos of different groups resemble each other at particular stages. Similarities indicate groups may share a common ancestor






37. Organisms with similar functions - but different underlying structure. Example: bird and insect wing. These structures do NOT show a common ancestral link.






38. These prevent fertilization between species e.g. diff breeding season - mating behaviour






39. A genetic crosses that involve one trait. e.g TT plant crossed with tt plant has offspring who are heterozygous Tt.






40. 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






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






42. The study of the structures of different organisms - looking at homologous parts






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






44. The capacity of an individual of certain genotype to reproduce. It is usually equal to the proportion of the individual's genes in all the genes of the next generation






45. Geologic period that followed the Precambrian;means 'ancient life' - early life (570-286 million years ago); single cell organisms - shells - mollusks - rise of first vertebrates - rise of land plants - amphibians - insects - seed plants - and trees






46. The molecules responsible for bringing amino acids to the ribosome during protein synthesis are






47. Impression made from a organism in soft material such as sand or mud.






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






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






50. 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.






Can you answer 50 questions in 15 minutes?



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