Test your basic knowledge |

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. Selection acting against the middle of a range of variation






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






3. 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.






4. Visual expression of a trait






5. A trait that masks the expression of another trait






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






7. 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.






8. What is one benefit for having two strands of DNA?






9. 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.






10. Transcrition occurs in the...






11. Natural selection that causes the frequency of a particular allele to move in one direction






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






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






14. Is any chromosome that is not a sex chromosome.






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






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






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






18. Form of reproductive isolation in which two populations reproduce at different times






19. 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






20. A body cell






21. Synonym for protein; chain of amino acids






22. Determined the concept of complementary base pairing






23. Hybrid is sterile so biologically unfit






24. Nucleotides that control which amino acids are added during protein synthesis






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






26. Pea plants






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






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






29. Actual remains of an organism such as bones - teeth - shells - etc.






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






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






32. What happens during the process of translation






33. Change in a DNA sequence that affects genetic information






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






35. 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






36. 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






37. T or F A cloned organism has the same proteins as another organism






38. Evolution of superficial phenotypic similarity of form as a result of similar selection pressures






39. A genetic crosses that involve one trait. e.g TT plant crossed with tt plant has offspring who are heterozygous Tt.






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






41. Two alternative forms of a gene e.g Tall vs Short






42. 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






43. 2 alleles for a character separate during the formation of gametes - so that each gamete only carriers one allele for each character

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


44. Individual that is heterozygous for two traits; shows the phenotype governed by the dominant alleles but carries the recessive alleles






45. Another name for a gene






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






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






48. The offspring of a cross between two inbred lines within a single species. May also refer to the offspring of across between two species






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






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