Pain that occurs with a fever, nausea, and vomiting or loss of appetite may be a sign of inflammation or infection of the gallbladder (acute cholecystitis). Symptoms that may mean that a gallstone is blocking the common bile duct include: 1  Yellowing of the skin and the white part of the eyes (jaundice).  Dark urine.
Mendel concluded that biological inheritance is determined by factors that are passed from one generation to the next. Mendel also concluded that the principle of dominance states that some alleles are dominant and others are recessive.
Mendel studied 'trait inheritance', patterns in the way traits were handed down from parents to offspring. He observed that organisms (pea plants) inherit traits by way of discrete units of inheritance. This term, still used today, is a somewhat ambiguous definition of what is referred to as a gene.roteins carry out many of the functions needed for cells to live. A change to the DNA in a gene can alter a protein's amino acid sequence, thereby changing its shape and function and rendering the protein ineffective or even malignant (e.g. sickle cell anemia).