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  1. allele
    any of the forms of a gene that can occupy the same locus
    Methylation also plays an important role in genomic imprinting, which occurs when both maternal and paternal alleles are present but only one allele is expressed while the other remains inactive.
  2. mRNA
    the template for protein synthesis
    Ribonucleic Acids
    In addition to mRNA, DNA codes for other forms of RNA, including ribosomal RNAs (rRNAs), transfer RNAs (tRNAs), and small nuclear RNAs (snRNAs). rRNAs and tRNAs participate in protein assembly whereas snRNAs aid in a process called splicing -the process of editing of mRNA before it can be used as a template for protein synthesis.
  3. blood type
    human blood cells that have the same antigens
    Then there are the not so obvious genetic variations, such as blood type.
  4. gene
    part of DNA controlling physical characteristics and growth
    The biological information contained in a genome is encoded in its deoxyribonucleic acid (DNA) and is divided into discrete units called genes.
  5. DNA
    material that carries genetic information in a cell
    The biological information contained in a genome is encoded in its deoxyribonucleic acid (DNA) and is divided into discrete units called genes.
  6. chromosome
    a threadlike strand of DNA that carries genes
    In 1909, Danish botanist Wilhelm Johanssen coined the word gene for the hereditary unit found on a chromosome.
  7. protein
    an organic compound essential to living cells
    Genes code for proteins that attach to the genome at the appropriate positions and switch on a series of reactions called gene expression.
  8. genome
    the full DNA sequence of an organism
    WHAT IS A GENOME?
  9. genetic
    relating to the study of heredity and variation in organisms
    The Physical Structure of the Human Genome

    Nuclear DNA

    Inside each of our cells lies a nucleus, a membrane-bounded region that provides a sanctuary for genetic information.
  10. cell
    the basic structural and functional unit of all organisms
    Genes instruct each cell type- such as skin, brain, and liver-to make discrete sets of proteins at just the right times, and it is through this specificity that unique organisms arise.
  11. molecule
    the simplest structural unit of an element or compound
    In a DNA chain, every base is attached to a sugar molecule (deoxyribose) and a phosphate molecule, resulting in a nucleic acid or nucleotide.
Created on 一月 28, 2010

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