def length_genome(chr_length_dict):
    
    """Output the length of the genome in bp 

    Parameters
    ----------

    chr_length_dict : dict
        A dictionary describing the length of each chromosome. 

    Returns
    -------
    int
        The length of the genome
    """
    
    chrom_list = ['I', 'II', 'III', 'IV', 'V', 'VI', 'VII', 'VIII', 'IX', 'X', 'XI', 'XII', 'XIII', 'XIV', 'XV', 'XVI']

    l_genome = 0
    for chrom in chrom_list:
        l_genome += int(chr_length_dict.get(chrom))
   
    
    return l_genome