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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. Change of an organism over time. This can be caused by changes in in habitat or need to adapt for survival.






2. What happens during the process of translation






3. Is the genetic makeup of an organism (TT or Tt) ; All the combinations of genes you have for a certain trait.






4. Heteros have a phenotype tintertmediate b/t phenotypes of the 2 homoz






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






6. Selection for the ability to obtain a mate






7. Innate trait; shared ancestry






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






9. Process in which DNA is duplicated






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






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






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






13. 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






14. Organ that serves no useful function in an organism






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






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






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






18. A type of natural selection in which genetic diversity decreases as the population stabilises on a particular trait value






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






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






22. Is found in DNA






23. Periods of rapid evolution punctuated by periods of little change






24. Trait where heterozygous is a blending of two alleles






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






26. What does DNA stand for...






27. 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.






28. In the event of a sperm fertilizing an egg of another species - mechanisms that prevent result being fruitful






29. 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






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






31. A process where the organisms that have traits that aid in its survival (adaptive traits) will reproduce to pass that trait to futher generations thus increasing the frequency of that trait in the population. Vice versa traits that reduce the chance






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






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






34. The backbone of DNA consist of...






35. Translation occurs in the...






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






37. Change in a DNA sequence that affects genetic information






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






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






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






41. Disappearance of a species from all parts of its geographical range






42. 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






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






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






45. Predicts the possible outcome of a genetic cross.






46. Method of replication that implies that each new strand of DNA is half original and half new






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






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






49. Molecules that join together to form DNA and RNA. Monomers that make up a nucleic acid






50. The structure on a tRNA molecule that allows it interact with an mRNA molecule