Autosomal recessive inheritance
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Autosomal Recessive Inheritance. Characteristics of autosomal recessive inheritance: no difference in expression between males and females matings between affected individuals produce 100% affected offspring Affected genotype (filled in shape) must be “dd”

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Autosomal recessive inheritance
Autosomal Recessive Inheritance

  • Characteristics of autosomal recessive inheritance:

    • no difference in expression between males and females

    • matings between affected individuals produce 100% affected offspring

    • Affected genotype (filled in shape) must be “dd”

    • Unaffected genotypes (empty shapes) can be either “DD” or “Dd”


Autosomal dominant inheritance
Autosomal Dominant Inheritance

  • Characteristics of autosomal dominant inheritance:

    • no difference in expression between males and females

    • no unaffected heterozygous individuals

    • does not skip generations

    • Affected genotypes (filled in shapes) can be either “Dd” or “DD”

    • Unaffected genotype (empty shape) must be “dd”


Sex linked x linked recessive inheritance
Sex-linked (X-linked) recessive inheritance

  • Characteristics of sex-linked (X-linked) recessive inheritance:

    • most affected individuals will be male

    • affected females must have an affected father and either a heterozygous or affected mother

    • affected females will have 100% affected sons

    • tends to skip generations

    • Affected genotypes (filled in shapes) must be “XdXd ”or “XdY”

    • Unaffected genotypes (empty shapes) can be “XDXD ”, “XDXd ”, or “XDY”


Sex linked x linked dominant inheritance
Sex-linked (X-linked) Dominant Inheritance

  • Characteristics of sex-linked (X-linked) dominant inheritance:

    • affected males must have affected mothers

    • affected females must have one affected parent

    • affected males will have 100% affected daughters

    • affected females are expected to produce half normal, half affected offspring

    • Affected genotypes (filled in shapes) can be “XDXD ”, “XDXd ”, or “XDY”

    • Unaffected genotypes (empty shapes) must be “XdXd ”or “XdY”


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