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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. The environmental factors that favour certain phenotypes






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






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






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






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






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






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






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






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






10. Genes contain instructions for assembling






11. Movement of organisms ro of from a population






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






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






14. The molecules responsible for bringing amino acids to the ribosome during protein synthesis are






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






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






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






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






19. Chromosomes are collections of many






20. An equilibrium in the occurence of two or more different froms within the same population usually caused by different allele combiinations of a gene






21. The complete genetic material contained in an individual






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






23. A codon is made of...






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






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






26. A change or error in the DNA sequence






27. A trait that masks the expression of another trait






28. 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.






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






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






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






32. Three dimensional shape of organism made from a mold. May be created with plaster or over time with minerals.






33. Change in a DNA sequence that affects genetic information






34. T or F a codon consist of three nucleotides






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






36. 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.






37. 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.






38. 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.






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






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






41. Predicts the possible outcome of a genetic cross.






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






43. Selection acting against the middle of a range of variation






44. To create a recombinant DNA molecule - one would have to first cut two DNAs with creating before pasting them together






45. 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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46. 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






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






48. The study relating the evolution of new charateristics to changes in the genes controlling development






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






50. Recognize and cut DNA at specific sequences usually palindromes