Genotypically Information and Courses from MediaLab, Inc.
These are the MediaLab courses that cover Genotypically and links to relevant pages within the course.
Learn more about laboratory continuing education for medical technologists to earn CE credit for AMT, ASCP, NCA, and state license renewal and recertification. Or get information about laboratory safety and compliance courses that deliver cost-effective OSHA safety training and continuing education to your laboratory's employees.
| Genotyping Those who type as group O must have two O genes present (since both the A and B genes would have produced recognizable antigens, neither of which is present on group O cells). Therefore, in the case of an AB individual or an O individual, we can tell exactly which genes are present, or a genotype. Group A or group B typing reveals only one gene product and thus only a phenotype can be determined. Persons of phenotype A can be genotype AA or AO , while those of phenotype B can be genotypically BB or BO. Family studies may be done to determine the genotype of an A or B individual. For example, if the mating of one A and one O parent produced a group O child, the second gene present in the A parent must have been O since the child has inherited one O gene from each parent. | View Page |
| Inherited Antigens A subgroup antigens are inherited, as are other ABO antigens with A1 being dominant over A2. Individuals who are phenotypically A1 may be genotypically A1O, A1A1, or A1A2. A phenotypically A2 individual may be genotypically A2A3. These alleles are passed to offspring in the same manner as other ABO antigens. Weak variant forms of the B antigen (B3, Bx, and Bel) also exist, but are very rare. | View Page |
