HEREDITY
SEX LINKAGE
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Her mother only
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Her father only
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Either parent
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Detailed explanation-1: -In X-linked recessive inheritance, a daughter inherits a single mutated gene on the X chromosome from one of her parents. The X chromosome she inherits from the other parent will usually cancel the effect of the mutation, and she most likely will not have the genetic condition.
Detailed explanation-2: -A female inherits one X chromosome from her mother and one X chromosome from her father. Males normally have an X and a Y chromosome (XY). A male inherits an X chromosome from his mother and a Y chromosome from his father.
Detailed explanation-3: -Sex-linked diseases are passed down through families through one of the X or Y chromosomes. X and Y are sex chromosomes. Dominant inheritance occurs when an abnormal gene from one parent causes disease, even though the matching gene from the other parent is normal.
Detailed explanation-4: -In humans, the term often refers to traits or disorders influenced by genes on the X chromosome, as it contains many more genes than the smaller Y chromosome. Males, who have only a single copy of the X chromosome, are more likely to be affected by a sex-linked disorder than females, who have two copies.
Detailed explanation-5: -In males (who only have one X chromosome), a mutation in the copy of the gene on the single X chromosome causes the condition. Fathers cannot pass X-linked dominant conditions to their sons, but all daughters of affected fathers will be affected with the condition and can pass it on to their children.