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






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






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






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






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






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






7. 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.






8. Hybrid is sterile so biologically unfit






9. Predicts the possible outcome of a genetic cross.






10. Ribosomes are made of...






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






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






13. 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.






14. Trait evolves overtime; NO common ancestry






15. The environmental factors that favour certain phenotypes






16. The movement of individuals into an area






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






18. Type of rock made from small pieces of other rocks and organisms pressed together. Source of fossil preservation. Limited radioactive or absolute dating potential.






19. Describes the isolation of a physical barrier e.g. body of water (ocean) or mountains






20. How often a particular gene occurs in the population






21. 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.






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






23. 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






24. The final product of transcription is...






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






26. Different alleles for a gene






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






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






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






30. Is a base found in DNA and RNA. This base pairs with Cytosine in DNA






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






32. Relatively rapid proliferation from an ancestral type into new types which fill a diversity of ecological niches






33. Change in a DNA sequence that affects genetic information






34. Physical characteristics of an organism based on its genotype. e.g. Plant that has a genotype of TT will have a phenotype of Tall.






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






36. Separation of species or populations so that they cannot interbreed and produce fertile offspring






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






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






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






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






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






42. Translation occurs in the...






43. Name for oism with one dominant and one recessive allele






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






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






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






47. 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






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






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






50. It means chromosomes are paired. One of each chromosome in a pair originates from the father and one from the mother. They affect the same trait - but don't necessarily cause the same expression of the trait.







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