Chromosomal Bases of Inheritance & Sex-Linked Traits

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6 Terms

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autosome

22 out of the 23 pairs

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sex chromosome

1 out of the 23 (X or Y)

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sex-linked traits

trait found more often in one gender than another

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what is an example of a sex-linked trait

hemophilia

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what is hemophilia (“royal” or “bleeding” disease)

defective gene of factor VIII, which helps with blood clotting

  • rarely found in females

  • 1/5,000 males

  • carried as recessive on the X chromosome

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why is hemophilia more common in males

it requires only 1 dose to have the conditions & for females its 2