Test your basic knowledge |

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. Identical alleles for a gene






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






3. Middle life (245-144 million years ago); rise of mammals and dinosaurs; the rise of birds; extinction of dinosaurs - rise of flowering plants






4. Pea plants






5. One of the identical rods of a chromosome.






6. The environmental factors that favour certain phenotypes






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






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






9. Genes contain instructions for assembling






10. A change or error in the DNA sequence






11. What does DNA stand for...






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






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






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






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






16. Mating of 2 oism that differ in 2 characters






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






18. 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






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






20. DNA that is coiled around proteins






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






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






23. A fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found






24. Uses metamorphic or igneous rock - calculates the age of an object by assessing the amount of radioactive element still present in the organism. Radioactive elements are slowly lost over time because of decay.






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






26. Layers of compressed sedimentary rock demonstrate the order or sequence at which events occurred. Cannot delineate the exact point of time - but is able to distinguish the order of events.






27. 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






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






29. Recognize and cut DNA at specific sequences usually palindromes






30. 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.






31. These prevent fertilization between species e.g. diff breeding season - mating behaviour






32. Is a trait that is more expressed than another trait. Is written in capital letters for Genotype. E.g Tall genotype is TT or Tt where T is the allele for tall trait and t is the trait for small. T will be expressed more.






33. How many codons are needed to specify three amino acids






34. 2 alleles for a character separate during the formation of gametes - so that each gamete only carriers one allele for each character

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


35. Periods of little adaptive change






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






37. 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






38. Organ that serves no useful function in an organism






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






40. 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






41. During transcription an RNA molecule is formed






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






43. It is the time from when the Earth formed and simple life - forms evolved (and it is the longest era)






44. Is any chromosome that is not a sex chromosome.






45. Situation in which allele frequencies remain constant






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






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






48. Chromosomes that determine the sex of an individual. These are X for female and Y for male. The female egg is an X while the male sperm can be X or Y






49. What is one benefit for having two strands of DNA?






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