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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. The banding pattern of a persons DNA after being cut and run on gel is called






2. 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






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






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






5. A change in the base sequence of DNA; the ultimate source of new alleles






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






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






8. Proteins are made of...






9. Dna moves during electrophoresis because of...






10. Innate trait; shared ancestry






11. Selection acting against the extremes of a range of variation - resulting in resistance to change in allele frequencies






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






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






14. 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.






15. DNA that is coiled around proteins






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






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






18. 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






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






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






21. 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.






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






23. Organisms with a similar underlying structure - but different function. Example: bird - bat and dolphin 'arm'. Shows a common ancestral link.






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






25. What does DNA stand for...






26. 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.






27. The backbone of DNA consist of...






28. DNA is made of...






29. Large - scale evolutionary changes that take place over long periods of time






30. Pea plants






31. A trait that masks the expression of another trait






32. Organ that serves no useful function in an organism






33. Organ no longer serves a function






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






35. Describes the existence of a prezygotic reproductive barrier between two species as a result of them occupying or breeding in different habitats within the same general geographical area






36. Is a base found in DNA and RNA. In DNA its partner is Thymine. In RNA its partner is Uracil






37. Hybrid is sterile so biologically unfit






38. T or F If a nucleic acid contain uracil it is DNA






39. 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






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






41. Mating of 2 oism that differ in 2 characters






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






43. A change in the base sequence of a gene






44. 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






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






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






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






48. All the genes in a population. genes are added by reproduction and immigration and lost by death and emigration






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






50. Predicts the possible outcome of a genetic cross.