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Name one example of an X linked trait in humans and if it is dominant or recessive and  explain what it means to be X linked dominant or recessive.

Question

Name one example of an X linked trait in humans and if it is dominant or recessive and  explain what it means to be X linked dominant or recessive.

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Solution

One example of an X-linked trait in humans is hemophilia, which is a recessive disorder.

Being X-linked means that the gene causing the trait or disorder is located on the X chromosome. Humans typically have two sex chromosomes, X and Y. Females have two X chromosomes, while males have one X and one Y chromosome.

In the context of X-linked inheritance, dominant means that an individual needs only one copy of the mutant gene to be affected by the disorder. This can occur in both males (who have only one X chromosome) and females (who have two X chromosomes). If a woman has a dominant mutation on one of her X chromosomes, she has a 50% chance of passing it on to her children.

On the other hand, X-linked recessive disorders, like hemophilia, mean that a male who inherits an affected X chromosome from his mother will have the disorder, because he doesn't have a second X chromosome to compensate for the mutation. Females can also be affected by X-linked recessive disorders, but they would need to inherit two copies of the mutant gene (one from each parent), which is less likely. Therefore, X-linked recessive disorders are more common in males than in females.

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Linked genes are usually ________.found on the Y chromosomefound on the X chromosomecodominantlocated close together on a chromosome

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