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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. 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






2. Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest






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






4. Organ that serves no useful function in an organism






5. process in which homologous chromosomes exchange portions of their chromatids during meiosis.






6. A taxon originating from and including a single common ancestor






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






8. Predicts the possible outcome of a genetic cross.






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






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






11. Separation of species or populations so that they cannot interbreed and produce fertile offspring






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






13. The independant evolution of similar traits - starting from a similar ancestral condition






14. Name for oism with one dominant and one recessive allele






15. DNA is made of...






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






17. The final product of transcription is...






18. Is a base found in DNA and RNA. In DNA its partner is Thymine. In RNA its partner is Uracil






19. Because of base pairing in DNA the amount of






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






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






22. A change or error in the DNA sequence






23. Trait evolves overtime; NO common ancestry






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






25. 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






26. Any agent that can cause a change in DNA






27. An ancestor that two or more descendants have in common






28. 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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29. Hybrid is sterile so biologically unfit






30. 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.






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






32. A geographic gradient in the extent to which a character is developed in a species






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






34. Identical alleles for a gene






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






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






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






38. Speciation preceded by a period of geographical isolation






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






40. Evolution resulting from small specific genetic changes that can lead to a new subspecies






41. The movement of genes between populations as a result of mating of migration






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






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






44. The comparison of the structures of different organisms






45. A combining of genes or characters different from what they were in the parents






46. Determined the concept of complementary base pairing






47. What happens during the process of translation






48. Physical characteristics of an organism based on its genotype. e.g. Plant that has a genotype of TT will have a phenotype of Tall.






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






50. The signal on a mRNA molecule that designates the end of the coding sequence is called the...