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Sex determination and Sex-linked traits

Sex determination and Sex-linked traits. Sex determination : the father determines the sex of the child P 1 = XY x XX. Sex-linked traits : are on the X chromosome. EX : colorblindness XY – normal male XX – normal female XcY – colorblind male XcXc – colorblind female

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Sex determination and Sex-linked traits

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  1. Sex determination and Sex-linked traits

  2. Sex determination: the father determines the sex of the childP1 = XY x XX

  3. Sex-linked traits: are on the X chromosome EX: colorblindness XY – normal male XX – normal female XcY – colorblind male XcXc – colorblind female XcX – carrier female

  4. Why are there no carrier males? The trait is on the X and males have only one X (Men either have the trait or don’t) Why are men more likely than women to be colorblind? XY or XcY = 50% XX or XcXor XcXc= 33% (carriers have normal vision)

  5. Ex:Hemophilia: the blood does not clot P1 = XhY x XhXh

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