Genetics: Analysis and Principles 5th Edition by Robert Brooker

تمرين 53

Figure 5.6 describes the results of X-chromosome inactivation in mammals. If fast and slow alleles of glucose-6-phosphate dehydrogenase (G-6-PD) exist in other species, what would be the expected results of gel electrophoresis for a heterozygous female of the following species
a. Marsupial
B. Drosophila melanogaster
C. Caenorhabditis elegans (Note: We are considering the hermaphrodite in C. elegans to be equivalent to a female.)
FIGURE 5.6 Evidence that adult female mammals contain one X chromosome that has been permanently inactivated.
Starting material: Several small skin samples taken from a woman who was heterozygous for the fast and slow alleles of G-6-PD.