Review_Of_Blood_Genetics

Review of Blood Genetics

 * Remember: All humans have two copies of every gene - one from their mother and one from their father. **

__P____henotype__- the expression of genes (traits) (An example is blood type, detached or attached ear lobe, eye color, intelligence, etc.)
====__Dominant-__ when one copy of a gene "overpowers" the other and is ultimately expressed (For example, in humans, the attached ear lobe gene copy is dominant over the unattached ear lobe gene copy, RR or Rr.) The opposite of __Dominant__ vs. __Recessive__. This is where there must be two copies of the recessive gene copy in order for the recessive trait to be expressed. (For example, in humans, the unattached ear lobe gene copy is dominant to the attached ear lobe gene copy, rr.)====


 * Figure 1. Dominant/Recessive: Attached vs. Unattached Ear Lobes in Human (Dominant/Recessive)**

Table 1. Blood genotypes and phenotypes (dominant, recessive, and co-dominance)

 * = =====**Genotype (Gene Copies)**===== ||= =====**-Phenotype (Blood Type, the Expression of the Gene Copies)**===== ||
 * = AA ||= Blood Type A (Dominance!) ||
 * = AO ||= Blood Type A (Dominance!) ||
 * = BB ||= Blood Type B (Dominance!) ||
 * = BO ||= Blood Type B (Dominance!) ||
 * = AB ||= Blood Type AB (Co-Dominance!) ||
 * = OO ||= Blood Type O (Recessive!) ||

Check your understanding!
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