Humans have two different alleles that determine if they can taste sodium benzoate (S and s). For individuals with one allele, sodium benzoate tastes salty, bitter, or sweet, whereas individuals with the other allele cannot taste anything. If both parents can taste sodium benzoate but their child cannot, what assumptions can be made about the mode of inheritance?

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Tasting sodium benzoate is recessive, and the genotypes of the parents must be Ss x ss.

  

Tasting sodium benzoate is recessive, and both parents must be heterozygous (Ss).

  

Tasting sodium benzoate is dominant, and the genotypes of the parents must be Ss x SS.

  

Tasting sodium benzoate is dominant, and both parents must be heterozygous (Ss).

 

asked May 2, 2013 in Genetics by anonymous
    

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Tasting sodium benzoate is dominant, and both parents must be heterozygous (Ss).
answered May 2, 2013 by anonymous

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