genetics.txt

Card Set Information

Author:
Anonymous
ID:
5603
Filename:
genetics.txt
Updated:
2010-01-29 22:27:43
Tags:
science
Folders:

Description:
Genetics Review
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user Anonymous on FreezingBlue Flashcards. What would you like to do?


  1. Name the three parts of a nucleotide.
    sugar molecule, phosphate, a nitrogen base
  2. What are James Watson and Frances Crick known for?
    they discovered the DNA structure
  3. 3 ways RNA differs from DNA
    RNA= ribose, single strand, uracil
  4. Each organism has a unique combination of characteristics encoded in the molecules of _______.
    DNA
  5. When does replication occur?
    during interphase, prior to cell divison
  6. What is the anticodon that would link up with the mRNA sequence AAU?
    UUA
  7. In what part of the cell does DNA replication occur?
    nucleus
  8. Where does transcription take place within the cell?
    at a region of DNA
  9. Replication and transcription are under the control of what?
    enzymes
  10. A group of three bases that signals the end of a chain of amino acids is a _____ codon.
    stop
  11. When replication occurs, what causes the DNA to "unzip"? What bonds are broken? Where do these bonds exist within the DNA molecule?
    Enzymes break the hydrogen bonds. They are located inbetween base pairs.
  12. How many different amino acids are there in living organisms?
    20
  13. Carries instructions to ribosomes on how to build proteins
    mRNA
  14. Cytosine and thymine belong to this chemical group
    pyrimidines
  15. DNA unzips by breaking these
    hydrogen bonds
  16. Site of protein synthesis
    cytoplasm
  17. 3 bases on tRNA that link up with a codon on mRNA.
    anticodon
  18. A change in the sequence of nucleotides within a gene.
    gene mutation
  19. A segement of a chromosome breaks off and then reattaches in reverse orientation to the same chromosome.
    inversion
  20. A segment of a DNA that breaks off a chromosome. As a result, all the info. on that part of the chromosome may be lost.
    deletion
  21. In an unequal crossover, one chromosome receieves an extra duplicate piece from its homologous partner.
    duplication
  22. An inherited condition in which only one sex chromosome (an X chromosome) is present in cells.
    Turner's syndrome
  23. Inherited condition in which the affected individual is a sterile male with an XXY karyotype.
    Klinefelter's syndrome
  24. Agents that cause mutations to occur.
    Mutagens
  25. Non-sex cells; body cells
    autosomes
  26. Three-chromosome pair
    trisomy
  27. One chromosome
    monosomy
  28. The failure of chromatids or chromosomes to separate during cell division.
    nondisjunction
  29. A chromosome piece breaks off and reattaches to another, homologous chromosome.
    translocation
  30. An organism is homozygous if__________________.
    it has two identical alleles for a trait
  31. The study of what you inherit is called ________.
    genetics
  32. Neither member of a pair of contrasting alleles is completely expressed when the other is present
    incomplete dominance
  33. The insertion of a needle to remove some fluid from around the embryo to examine for genetic defects is called ________.
    amniocentesis
  34. A tiny camera is inserted through a small incision in the uterus.
    fetoscopy
  35. High frequency sound waves bounce off the fetus forming an image. The image is called a sonogram.
    ultrasound
  36. Who determines the sex of the offspring?
    male
  37. Another name for "bleeder's disease"
    hemophilia
  38. Trait that deals with multiple alleles
    multiple allele
  39. What chromosome are sex-linked disorders generally associated with?
    X
  40. The passing of traits from parents to offspring is called _______.
    heredity
  41. Two sex-linked disorders:
    muscular dystrophy, hemophilia
  42. What kind of mutations occur in sex cells and are passed on to offspring?
    germ mutations
  43. What kind of mutations occur in body cells and are passed on to daughter cells by mitosis?
    somatic mutations
  44. A genetic disorder that involves trisomy
    down's syndrome
  45. A group of genes located on one chromosome
    linkage group
  46. What is the exchange of alleles between homologous chromosomes.
    crossing-over
  47. Two genetic disorders that are examples of a single gene disorder:
    cystic fibrosis, sickle-cell anemia
  48. Eye color and skin color are controlled by two or more genes so they are called ___________ traits.
    multiple allele
  49. A person that has the genotype XXY would suffer from what genetic disorder?
    klinefelter's
  50. A person who has the genotype XO would have what genetic disorder?
    turner's
  51. What type of cross deals with only one hybrid trait?
    monohybrid cross
  52. Cancer-causing mutagens
    carcinogens

What would you like to do?

Home > Flashcards > Print Preview