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Autosomal dominant disorders are a group of genetic conditions characterized by specific inheritance patterns. To understand these disorders, let's explore their fundamental features:
Key Concepts | Description |
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1. Dominant Variants | Autosomal dominant disorders result from a genetic condition caused by a variation in one copy of a gene. A single mutated allele is sufficient to cause the disease. |
2. Autosomal Inheritance | Autosomal dominant conditions involve genes located on autosomes, which are non-sex chromosomes (chromosomes 1-22). These disorders are not linked to sex chromosomes (X and Y). |
3. Inheritance from Either Parent | Individuals can inherit autosomal dominant disorders from either parent. It is not restricted to one specific parental lineage. |
4. Probability of Passing On | When affected individuals have children, there is a 50% chance of passing on the faulty gene to their offspring. Similarly, there is a 50% chance of passing on a normal copy of the gene. This probability is independent of the child's gender and is random for each pregnancy. |
5. Equal Effect on Males and Females | Autosomal dominant disorders typically affect both males and females in the same way, without gender bias in their expression. |
6. Generation-to-Generation Transmission | These conditions are passed down from one generation to the... |
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