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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. Dna moves during electrophoresis because of...






2. When competition causes two closely related species to become more different in regions where their ranges overlap






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






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






5. Trait where heterozygous is a blending of two alleles






6. Which structure contains anticodons






7. Messenger RNA; type of RNA that carries instructions from DNA in the nucleus to the ribosome






8. Speciation which does not involve a period of geographical separation






9. Describes a cell - nucleus - or organism that has only one set of unpaired chromosomes






10. The specific location of a gene on a chromosome






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






12. Is a sequence of DNA that codes for a protein and thus determines a trait. This is because the sequence of bases code for certain proteins.






13. Features of different species tat are similar in function but not necessarily in structure and in which the similarity is not the result of common ancestry






14. A nucleotide of RNA is made of...






15. Selection against one end of a range of variation - resulting in a progressive change in allele frequency






16. 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






17. An organism that has characteristics resulting from chromosomal alteration. This is a result of crossing over of the chromosomes during Meiosis - mutations and random segregation.






18. Identical alleles for a gene






19. A body cell






20. Separates DNA by size






21. Reciprocal evolution in two species as a result of the selection pressure each imposes upon the other






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






23. The adaptive increase in pigmentation as a result of human - induced pollutants






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






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






26. What happens during the process of translation






27. 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.






28. Term used to refer to an organism that has two different alleles for the same trait. e.g Tt is the heterozygous genotype for Tall.






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






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






31. Chromosomes are collections of many






32. A trait that masks the expression of another trait






33. 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






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






35. Copying the code from DNA onto mRNA






36. The capacity of an individual of certain genotype to reproduce. It is usually equal to the proportion of the individual's genes in all the genes of the next generation






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






39. Building block of a protein






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






41. A unique combination of traits that are passed down from one generation to another.






42. 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.






43. Evolution of the earth - which is hypothesized to have been formed over 4.6 billion years ago.






44. The enzyme that binds to the promoter region of a gene during transcription is called...






45. Process in which DNA is duplicated






46. One of the types of fossils made from hardened tree resin. Preserves both hard and soft parts.






47. 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.






48. Organ no longer serves a function






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






50. Three mRNA nucleotides that code for a specific amino acid







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