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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. Similar embryological structures in different species - such as gill slits - may demonstrate that these species share a common ancestor.






2. Organ no longer serves a function






3. Transcrition occurs in the...






4. 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






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






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






7. Change to a chromosome in which a fragment of one chromosome attaches to a nonhomologous chromosome






8. Any agent that can cause a change in DNA






9. Gene

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






11. A codon is made of...






12. 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.






13. A small simple structure (as a fertilized egg) from which new tissue can develop into a complete organism. It is also a cell






14. Because of base pairing in DNA the amount of






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






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






17. During transcription an RNA molecule is formed






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






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






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






21. Separates DNA by size






22. Transfer RNA; type of RNA that carries amino acids to the ribosome






23. Which structure contains anticodons






24. Closely related species occupying different habitats - niches preventing them from interbreeding






25. Which type of Rna functions as a blue print of the genetic code






26. You mate the unknown genotype with an organism showing the recessive trait. If any of the offspring show the recessive trait - the original unknown parent was heterozygous. If no recessive trats show up - the original parent was homozygous.






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






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






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. Similar DNA sequences or protein structures (such as hemoglobin) may link different species to a similar ancestor.






31. Organ that serves no useful function in an organism






32. A model for the evolution of different froms over a long period of time but with only slight chchanges occring between successive generations






33. A change or error in the DNA sequence






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






35. Used radioactive sulfur and radioactive phosphorus to determine that DNA is the genetic material - by demonstrating that it is DNA that is injected by bacteriophages into bacterial cells during infection






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






37. A DNA strand that has the bases CTAATGT forms a complete complementary double helix with






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






39. The specific location of a gene on a chromosome






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






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






42. A trait that masks the expression of another trait






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






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






45. Used x ray cyrstallography to create an image of DNA






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






47. A type of barrier between species; the species remain isolated because male and femal gametes of the different species cannot fuse - or they die before they unite.






48. Different alleles for a gene






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






50. Ribosomes are made of...