Albinism An allele that causes a recessive condition such as albinism codes for a malfunctioning protein or for no protein at all. Heterozygotes have a normal phenotype because one normal allele produces enough of the required protein. Albinism shows up only in homozygous individuals who inherit a recessive allele from each parent. Individuals who do not have the disorder are either homozygous dominant or heterozygotes. Although heterozygotes may lack obvious phenotypic effects, they are carriers who may transmit a recessive allele to their offspring. Most people with recessive disorders are born to carriers with normal phenotypes. o In a mating between two carriers of albinism, each child has a 1/4 chance of inheriting the disorder, a 1/2 chance of being a carrier, and a 1/4 chance of being homozygous dominant. Genetic disorders are not evenly distributed among all groups of humans.
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This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.