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20 Cards in this Set
- Front
- Back
What is used to signify wildtype?
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The superscript +
As in X^+ |
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crisscross inheritance
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inheritance pattern in which males inherit a trait from their mothers, while daughters inherit the trait from their fathers
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X linked
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gene carried by the X chromosome
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hemizygous
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describes the genotype for genes present in only one copy in an otherwise diploid organism
e.g., X-linked genes in a male |
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nondisjunction
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the failure of separation between chromosomes during meiosis
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deuteranopia
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red-green color blindness; X-linked
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hemophilia
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a disease in which blood fails to clot properly
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If a trait appears more in males than females, it must be
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an X-linked recessive trait
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If the trait never passes from father to son, it must be
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X-linked recessive (the son receive a Y)
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All daughters of an affected male are unaffected. It must be:
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X-linked recessive
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The trait often skips a generation as the mutation passes from grandfather through a carrier daughter to a grandson. The trait must be:
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x-linked recessive
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With the rare affected female, all her sons will be affected and all her daughters carriers. The trait must be:
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x-linked recessive
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More females than males show the trait. It must be
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X-linked dominant
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All the daughters but none of the sons of an affected male will be affected. The trait must be:
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X-linked dominant
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One-half the sons and one-half the daughters of an affected female will be affected. The trait is:
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X-linked dominant
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The trait is seen only in males. It is:
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Y-linked
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All male descendants of an affected man will exhibit the trait. It is:
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Y-linked
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Not only do females not exhibit the trait, they also cannot transmit it. The trait is:
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Y-linked
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sex-limited traits
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affect a structure or process that is found in one sex but not the other
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sex-influenced traits
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Show up in both sexes, but expression of such traits may differ between the two sexes because of hormonal differences
e.g., male pattern baldness (which is dominant in men, recessive in women) |