Genetics

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genrip22
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87238
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Genetics
Updated:
2011-05-22 19:44:27
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Genetics
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Genetics
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  1. They have two copies of the genome
    diploid
  2. Only have one of each type of chromosome.
    haploid
  3. Where are diploid cells found?
    somatic cells
  4. Where are haploid cells found?
    gametes
  5. What are gamates?
    sex cells
  6. The fertilized ovum is called a _________.
    zygote
  7. Is a zygote haploid or diploid?
    diploid
  8. A form of cell divison in which certain cells are set aside to give rise to haploid gamates.
    meiosis
  9. ________ have the same genes in the same order but may carry differnt alleles.
    homologous chromosomes
  10. __________ helps to generate genetic diversity by mixing up parental traits.
    crossing over
  11. mitosis has __ daughter cells per cycle.
    2
  12. meiosis has __ daughter cells per cycle.
    4
  13. The failure of homologous chromosomes to seperate properly during meiosis.
    nondisjunction
  14. cell with an extra chromosome.
    trisomies
  15. cell with one less chromosome
    monosomies
  16. During which stage of meiosis does nondisjunction occur?
    anaphase
  17. A Chromosome chart; photograph of chromosomes in meatphase.
    karyotype
  18. How are karyotypes used?
    • detect chromosomal abnormalities
    • confirm a clinical diagnosis
    • determine gender
    • clarify evolutionary relationship
  19. Who was the father of genetics?
    Gregor Mendel
  20. Mendel chose to study_______ because...
    • pea plants
    • they were easy to cross pollinate
    • easily distinguishable traits
  21. The transmission of genetic characters from parents to offspring.
    heredity
  22. A unit of heredity composed DNA occupying a fixed position on a chromosome.
    gene
  23. Alternate form of a gene
    alleles
  24. An organism's allele combination
    genotype
  25. Physical expression of the genes.
    phenotype
  26. Two of the same alleles
    ex: TT tt
    Homozygous
  27. Two differnt alleles
    ex: Tt
    Heterozygous
  28. If present, this allele is present.
    dominant
  29. Masked by the dominant allele. May be expressed if paried with another recessive.
    Recessive
  30. Contains genetic information neccessary to make proteins.
    DNA
  31. The basic building block of DNA is...
    nucleotide
  32. A nucleotide is composed of three parts:
    • Deoxyribose
    • phosphate group
    • nitrogen base
  33. What are the four nitrogen bases found in DNA?
    • adenosine
    • guanie
    • thymine
    • cytosine
  34. Who discovered the structure of DNA?
    Watson and Crick
  35. How does RNA differ from DNA?
    ________ base instead of thymine
    ________ instead of dexoyribose
    ________ stranded
    Involved in the actual buliding of ________.
    • Uracil
    • Ribose
    • Single
    • Proteins
  36. Amino acid "codes"
    codons

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