In humans, brown spotting of teeth is caused by a dominant x-linked gene and if a man with brown teeth marries a woman with normal teeth, than the female is heterozygous dominant for brown teeth.
A gene is that the basic physical and practical unit of heredity. Genes ar created from polymer. Some genes act as directions to create molecules referred to as proteins. However, several genes don't code for proteins. In humans, genes vary in size from many hundred polymer bases to over two million bases.
An organism with 2 dominant alleles for a attribute is alleged to own a homozygous dominant genotype. victimisation the attention color example, this genotype is written BB. An organism with one dominant allelomorph and one recessive allelomorph is alleged to own a heterozygous genotype.
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