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genentics 2 - kashmala
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11-06-2006, 07:07 PM
Which of the following karyotypic abnormalities in a
liveborn baby is most likely to be found in a parent? A Robertsonian translocation B Ring chromosome C Isochromosome D Paracentric inversion E A q arm deletion
11-06-2006, 08:04 PM
A
Nearly all of the normal genetic material is present in the case of a robertsonian translocation, because only a small amount of p arm from each chromosome is lost. Statistically, one of six fetuses ries a robertsonian translocation will also be a carrier. In balanced reciprocal translocation, the same possibility of inheriting the defect exists. However, other structural ab- normalities are likely to result in loss of significant genetic material, reducing survivability, or to interfere with meio- sis. |
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