Sex linked all three males recessive

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The term 'color-blind' is not completely accurate. Females have two X chromosomes, while males have one X and one Y chromosome. If the mother is not a carrier, no male children of an affected father will be affected, as males only inherit their father's Y-chromosome. X-linked traits are maternally inherited from carrier mothers or from an affected father. Females rarely show signs of X-linked recessive conditions as they usually have a second unaltered copy of the gene on their other X chromosome to compensate for an altered gene see X-inactivation.

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Since males only have one X chromosome, any mutated gene on the X chromosome, dominant or recessive, will result in disease.

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X-linked recessive inheritance

In contrast, mothers pass X-linked genes to both sons and daughters. One abnormal gene on the X chromosome can cause a sex-linked dominant disease. Sex-linked diseases are inherited through one of the sex chromosomes, which are the X and Y chromosomes. Color blindness red and green, but not blue Ocular albinism 1 Norrie disease Choroideremia Other: It also depends on whether the trait is dominant or recessive. How does DNA change? That is because daughters always inherit their father's X chromosome.

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