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.
Definition: Genes are segments of DNA located on chromosomes. Genes exist in alternative forms called alleles. Alleles determine distinct traits that can be passed on from parents to offspring.The process by which genes are transmitted was discovered by Gregor Mendel and formulated in what is known as Mendel's law of segregation.lleles determine distinct traits that can be passed on from parents to offspring. The process by which genes are transmitted was discovered by Gregor Mendel and formulated in what is known as Mendel's law of segregation.