@classmethod<EOL><INDENT>def create_random(cls, length, **kwargs):<DEDENT>
dna = '<STR_LIT>'.join([random.choice(cls.GENETIC_MATERIAL_OPTIONS) for _ in range(length)])<EOL>return cls(dna, **kwargs)<EOL>
Return a new instance of this gene class with random DNA,
with characters chosen from ``GENETIC_MATERIAL_OPTIONS``.

length:  the number of characters in the randomized DNA
**kwargs:  forwarded to the ``cls`` constructor