The parents of a child with PKU are concerned about the risk of transmitting the disorder in future pregnancies.The correct assessment of the risk is

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As an autosomal-recessive disorder,the mating of two carriers (heterozygous)results in a 1 in 4 chance of producing an affected offspring and a 2 in 4 chance of producing an offspring who carries the disease.The mating of two carriers (heterozygous)results in a 2 in 4 chance of producing an offspring who carries the disease.The mating of two carriers (heterozygous)results in a 1 in 4 chance of producing an affected offspring and a 2 in 4 chance of producing an offspring who carries the disease.One can predict the risk of future pregnancies.

The Parents of a Child with PKU Are Concerned About