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






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






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






4. 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.






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






6. Cell division in which the nucleus divides into nuclei containing the same number of chromosomes. Mitosis involves growth and repair and occurs in the body cells.






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






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






9. A trait that masks the expression of another trait






10. Middle life (245-144 million years ago); rise of mammals and dinosaurs; the rise of birds; extinction of dinosaurs - rise of flowering plants






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






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






13. Group of individuals of the same species that live in the same area






14. Hybrid is sterile so biologically unfit






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






16. 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






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






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






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






20. Process in which DNA is duplicated






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






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






23. The final product of transcription is...






24. A change or error in the DNA sequence






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






26. 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






27. Change in allele frequencies as a result of the migration of a small subgroup of a population






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






29. Another term for pure breeding






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






31. Which structure contains anticodons






32. A mutation in which one nucleotide is replaced by another nucleotide






33. 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






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






35. The structure on a tRNA molecule that allows it interact with an mRNA molecule






36. Earth's history organized into four eras: Precambrian - Paleozoic - Mesozoic - and Cenozoic






37. Genes contain instructions for assembling






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






39. Different alleles for a gene






40. Mutation where an extra base is added






41. The number of times an allele appears in a population






42. Pea plants






43. The adaptive increase in pigmentation as a result of human - induced pollutants






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






45. Even if the gametes of the two species meet - fertilization does not occur






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






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






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






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






50. Organism is preserved at very low temperatures. Preservation of both hard and soft parts can occur.