Question textIf an individual has only one recessive gene for an autosomal recessive disorder they will not be affected by the condition.
Question
Question textIf an individual has only one recessive gene for an autosomal recessive disorder they will not be affected by the condition.
Solution
That's correct. An individual with only one recessive gene for an autosomal recessive disorder is known as a carrier. They will not show symptoms of the disorder themselves, but they have a 50% chance of passing the recessive gene to their offspring.
Here's a step-by-step explanation:
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Autosomal recessive disorders are caused by two copies of a gene mutation - one from each parent.
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If an individual has only one copy of the mutated gene (and one normal gene), they will not have the disorder. This is because the normal gene can do the job of the gene that is mutated.
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However, this individual is a carrier for the disorder. This means that they can pass the mutated gene to their children.
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If their partner is also a carrier, each of their children has a 25% chance of inheriting two mutated genes and having the disorder. Each child also has a 50% chance of being a carrier like their parents, and a 25% chance of inheriting two normal genes.
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If their partner is not a carrier, none of their children will have the disorder, but each child has a 50% chance of being a carrier.
Similar Questions
Presence of the phenotype of an autosomal recessive disorder in one generation and then absence of the phenotype in the next generation likely meansMultiple choice question.the allele is present in heterozygotes that are carrying the disorder.the disorder has mutated into another form.the allele has not been passed to the next generation.the disorder has ceased to exist in the family.
Question textIf a disorder is passed on through recessive inheritance, the person will have a gene pair in which one copy is faulty and the other is working properly and so will be a carrier of the faulty gene who is unaffected by the disorder.
Select all of the following that describe the inheritance of an autosomal dominant disorder.Multiple select question.expressed in homozygous recessive individuals but not in heterozygous individualstypically present in every generationNOT typically present in every generationexpressed in homozygous dominant individuals and heterozygous individuals
If a child is born with a genetic disorder when neither of his biological parents have that disorder, the trait is likely to be caused by: a recessive allele on an autosome a gene on the X chromosome a dominant allele on the autosome a gene on the Y chromosome
It requires only one affected allele in order to express that trait.Group of answer choicesautosomal dominant disorderautosomal recessive disorderNext
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