A fetus is found to have an autosomal recessive condition. After genetic testing is completed, both parents are found to have the same genetic alteration
Which statements by a parent indicate that further education is required? Note: Credit will be given only if all correct choices and no incorrect choices are selected. Select all that apply. 1. "This condition is related to a genetic alteration of the X chromosome.".
2. "This condition is a Mendelian condition.".
3. "So we are carriers of this condition because we don't have any signs or symptoms of the condition.".
4. "Our baby would have a better chance of living if we were both positive for an autosomal dominant condition.".
5. "The problem is the result of an alteration of a single gene.".
1,4
Rationale 1: Genetic alterations of the X chromosome are referred to as X-lined recessive or X-linked dominant conditions, not autosomal recessive conditions.
Rationale 2: This is a Mendelian condition because it follows Mendel's laws of inheritance.
Rationale 3: The parents deny having any clinical manifestations associated with the condition, so they are likely carriers of the condition.
Rationale 4: It is not necessarily true that the infant will die because of an autosomal recessive condition. The baby affected by a homozygous autosomal dominant condition is much more likely to die from problems associated with that type of condition.
Rationale 5: Autosomal recessive conditions are single-gene disorders.
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