HEREDITY
MUTATIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They could pass it along to their children.
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They don’t have the disease themselves.
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Both are true.
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Detailed explanation-1: -A carrier, as related to genetics, is an individual who “carries” and can pass on to its offspring a genomic variant (allele) associated with a disease (or trait) that is inherited in an autosomal recessive or sex-linked manner, and who does not show symptoms of that disease (or features of that trait).
Detailed explanation-2: -If you are born to parents who both carry the same autosomal recessive gene, you have a 25% (1 in 4) chance of inheriting the abnormal gene from both parents and developing the disease. You have a 50% (1 in 2) chance of inheriting one abnormal gene. This would make you a carrier.
Detailed explanation-3: -People are sometimes concerned or surprised about finding out that they carry a genetic condition. Every person on earth carries several genetic conditions (mutations), usually without any symptoms or signs, so it’s actually quite normal to test positive.
Detailed explanation-4: -A carrier is a person who has a genetic variant, meaning the person has a change in their DNA on one of their two copies of a gene. Often, this variant is associated with a rare condition. This variant may or may not lead to symptoms of a rare disorder, but it can be passed on to children.