Researchers trying to determine the genetic basis of a rare metabolic disease have been examining the pedigrees of three families affected with the disease
For all of the families, the disease is coinherited with markers on chromosome 2 and chromosome 8 . They later observe that family members show no disease if they have the defect on only chromosome 2 or on only chromosome 8 . At this point the researchers could conclude that:
A. the disease is caused by defects in two or more genes on different chromosomes.
B. the gene product of chromosome 2 combines with the product from chromosome 8 to form defective protein.
C. family members with no disease have mutations that compensate for the defects on chromosome 2 or 8
D. the same disease can be caused by defects in single genes on different chromosomes.
E. family members with the single defect have normal cellular function.
A
You might also like to view...
Hemagglutination is
A. the clumping together of red blood cells in the presence of a viral suspension. B. the clumping together of infected cells in the presence of a viral suspension. C. the binding of iron in the process of a viral suspension. D. None of the choices are correct.
When a usable organic electron donor is present, sulfate serves as a terminal electron acceptor during anaerobic respiration by ________.
A. Desulfonema B. Desulfovibrio C. Archaeoglobus D. All of the choices are correct.
All of the following are desirable features in a microbial cloning host, except
A. the host has a well-delineated genome. B. the host has a slow growth rate. C. the host is capable of accepting plasmid vectors. D. the host can be grown in large quantities. E. the host will secrete a high yield of proteins from expressed foreign genes.
The transfer of DNA fragments from a dead cell to a live, competent recipient cell that results in a changed recipient cell is
A. transformation. B. transmission. C. mitosis. D. transduction. E. conjugation.