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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. 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






2. A DNA double helix is held together in the center by between nitrogenous bases






3. Is found in DNA






4. Situation in which allele frequencies remain constant






5. Movement of alleles into or out of a population due to the migration of individuals to or from the population






6. Building block of a protein






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






8. The movement of individuals into an area






9. Pea plants






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






11. 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






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






13. shape of a DNA molecule formed when two twisted DNA strands are coiled into a springlike structure and held together by hydrogen bonds between the bases.






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






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






17. During transcription an RNA molecule is formed






18. Deoxyribonucleic acid carries the genetic code for the proper functioning of an organism. It is composed of 5 carbon sugar (deoxyribose) four bases Adenine - Thymine - Cytosine and Guanine. the sugar is bonded to a phosphate group. This forms a long






19. Condition in which an organism has extra sets of chromosomes






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






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






22. Trait where heterozygous is a blending of two alleles






23. The evolutionary process by which a species becomes better suited to its niche.






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






25. A trait that masks the expression of another trait






26. What happens during the process of translation






27. When chromosome is changed by radiation and chemicals - results a permanent structural change in the chromosome - which will no longer be able to pair with its homologous pair. Eg - deletion - duplication - inversion and translocation.






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






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






30. 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






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






32. A limb with five digits (fingers)






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






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






35. The study of the structures of different organisms - looking at homologous parts






36. DNA is made of...






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






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






39. Consists of all genes - including all the different alleles - that are present in a population






40. Trait evolves overtime; NO common ancestry






41. A nucleotide of RNA is made of...






42. Another term for pure breeding






43. The final product of transcription is...






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






45. Any preserved remains of an organism from the past. Usually found in sedimentary rock.






46. Earth's history organized into four eras: Precambrian - Paleozoic - Mesozoic - and Cenozoic






47. A body cell






48. DNA that is coiled around proteins






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






50. Era of recent life that began about 66 million years ago and continues today; includes the first appearance Hominids