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






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






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






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






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






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






7. Movement of organisms ro of from a population






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






9. 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.






10. When zygote does not complete development or is physically weaker than normal






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






12. 2 alleles for a character separate during the formation of gametes - so that each gamete only carriers one allele for each character

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13. Two alternative forms of a gene e.g Tall vs Short






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






15. Pea plants






16. A copy of a gene is made during a process called this






17. Selection against one end of a range of variation - resulting in a progressive change in allele frequency






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






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






20. How often a form of a gene appears in a gene pool






21. Is found in DNA






22. Copying the code from DNA onto mRNA






23. shape of a DNA molecule formed when two twisted DNA strands are coiled into a springlike structure and held together by hydrogen bonds between the bases.






24. Any indirect evidence of life preserved as an impression in rock; trails - footprints - tracks - burrows - and bite marks






25. A limb with five digits (fingers)






26. 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






27. 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






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






29. 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.






30. The specific location of a gene on a chromosome






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






32. All the factors in an organism's surroundings that can potentially affect it






33. Different alleles for a gene






34. 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.






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






36. 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.






37. Identical alleles for a gene






38. Condition in which an organism has extra sets of chromosomes






39. The enzyme that binds to the promoter region of a gene during transcription is called...






40. Are noncoding sequences in the gene that are removed from RNA after transcription






41. Independent segregation of genes during the formation of gametes






42. 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






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






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






45. Change in a DNA sequence that affects genetic information






46. Which structure contains anticodons






47. Features of different species tat are similar in function but not necessarily in structure and in which the similarity is not the result of common ancestry






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






49. Determined the concept of complementary base pairing






50. Situation in which allele frequencies remain constant