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






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






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






5. Form of reproductive isolation in which two populations reproduce at different times






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






7. 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.






8. Visual expression of a trait






9. Selection for the ability to obtain a mate






10. Process by which one species gives rise to two or more species






11. A change in the base sequence of a gene






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






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






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






15. A unique combination of traits that are passed down from one generation to another.






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






18. Which structure contains anticodons






19. An ancestor that two or more descendants have in common






20. Is a sequence of DNA that codes for a protein and thus determines a trait. This is because the sequence of bases code for certain proteins.






21. Synonym for protein; chain of amino acids






22. Periods of little adaptive change






23. One of the identical rods of a chromosome.






24. Any agent that can cause a change in DNA






25. Another name for a gene






26. A type of protein molecule found in the chromosomes of eukaryotic cells but not prokaryotic cells






27. Determined the concept of complementary base pairing






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






29. 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.






30. Dna moves during electrophoresis because of...






31. Breeding organisms with specific traits in order to produce offspring with identical traits






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






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






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






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






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






37. 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






38. Evolution of living things - based on evidence from the past and present.






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






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






41. The preserved remains or traces of an organism that lived in the past






42. Inherited feature that tends to prevent species from interbreeding with other species






43. Independent segregation of genes during the formation of gametes






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






45. Because of base pairing in DNA the amount of






46. Method of replication that implies that each new strand of DNA is half original and half new






47. Is the genetic makeup of an organism (TT or Tt) ; All the combinations of genes you have for a certain trait.






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






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






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