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14 Cards in this Set
- Front
- Back
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Describe how recessive and dominant disorders in humans are inherited |
Dominant disorders can be inherited as long as the dominant allele is present, but recessive disorders can only be inherited when both recessive alleles are present. |
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Examples of sex-linked traits |
- color blindness - hemophilia |
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What causes down syndrome? |
trisomy on the 21st chromosome |
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aneuploidy |
having too many or too few copies of a particular chromosome (result of non-disjunction) |
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autosomal inheritance |
a pattern of inheritance in which the transmission of traits depends on the presence or absence of certain alleles on the autosomes |
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deletion |
loss of a part of a chromosome |
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inversion |
part of a chromosome becomes oriented in the reverse direction |
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insertion |
A type of mutation resulting from the addition of extra nucleotides in a DNA sequence or chromosome |
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nondisjunction |
failure of sister chromatids or homologous chromosomes to separate during nuclear division (anaphase II) |
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pedigree |
diagram showing genetic relationships between members of a family |
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polyploidy |
having three or more of each type of chromosome characteristic of the species (common in plants) |
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reciprocal translocation |
A type of chromosome rearrangement involving the exchange of chromosome segments between two chromosomes that do not belong to the same pair of chromosomes |
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sex linked inheritance |
A trait associated with a gene that is carried only by the male or female parent |
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translocation |
two chromosomes exchange broken parts |
