![]() If both parents are carriers for the same autosomal recessive condition or the female partner is a carrier for an X-linked condition, the couple therefore have an increased chance of having a child with a genetic condition. For X-linked conditions, only the female partner needs to be offered screening. Fragile X syndrome is an example of a common X-linked condition. ![]() For X linked conditions, it is usually the male who is affected but there are some conditions where a female who is a carrier for the condition may also have some symptoms. A female who is a carrier for an X-linked condition will have up to a 25% chance of having a male child with the condition. X-linked – Some genetic conditions are caused by faults in genes on the X chromosome. Common autosomal recessive conditions are: cystic fibrosis and spinal muscular atrophy. Most of the conditions screened through genetic carrier screening are autosomal recessive conditions. If the parents are both carriers for a change in the same gene, there will be a 1 in 4 or 25% chance of having a child with the condition for each pregnancy. These conditions are passed through families in certain ways which are called ‘autosomal recessive’ and ‘X linked’.Īutosomal recessive – Babies inherit one copy of each gene from each biological parent. Genetic carrier screening screens for inherited genetic conditions. For these reasons, it is recommended that healthcare providers offer genetic carrier screening to anybody planning a pregnancy or in early pregnancy. ![]() Most people who are genetic carriers do not have anybody in their family with the genetic condition. People who are carriers for genetic conditions are usually completely unaware they carry the condition/s. It is thought that everyone is a genetic carrier for at least two inherited conditions. How common is it to be a genetic carrier?
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