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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. 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






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






4. Movement of organisms ro of from a population






5. 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






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






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






8. To create a recombinant DNA molecule - one would have to first cut two DNAs with creating before pasting them together






9. Mating of 2 oism that differ in 2 characters






10. Populations that can interbreed with neighboring populations but not with populations separated by larger geographical distances






11. The type of environment in which an organism or group normally lives or occurs






12. What does DNA stand for...






13. Speciation preceded by a period of geographical isolation






14. The gradual changes in gene frequencies in a population due to random events






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






16. Another term for pure breeding






17. Periods of little adaptive change






18. How often a particular gene occurs in the population






19. Is a base found in DNA and RNA. Cytosine pairs with Guanine in DNA






20. Ribosomes are made of...






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






22. The environmental factors that favour certain phenotypes






23. A pairing where the parent plants differ in only one character.






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






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






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






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






28. Genes contain instructions for assembling






29. Separates DNA by size






30. The molecules responsible for bringing amino acids to the ribosome during protein synthesis are






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






32. A limb with five digits (fingers)






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






34. Human - like species that existed millions of years ago as witnessed through fossil evidence.






35. During transcription an RNA molecule is formed






36. Any agent that can cause a change in DNA






37. Three mRNA nucleotides that code for a specific amino acid






38. Form of reproductive isolation in which structural differences in the anatomy of reproductive organs prevent sperm transfer between individuals of different species






39. Determined the concept of complementary base pairing






40. Selection acting against the middle of a range of variation






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






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






43. Embryos of similar organisms have very similar early development indicating similar DNA at work






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






45. Organisms with similar functions - but different underlying structure. Example: bird and insect wing. These structures do NOT show a common ancestral link.






46. Mating of an individual of unknown genotype but dominant phenotype w/ a homozygous recessive individual






47. Change in a DNA sequence that affects genetic information






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






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






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