Fill in the structures of the flow of blood through the hear…

Fill in the structures of the flow of blood through the heart:  Vena cava –> _______ –> Tricuspid valve –> Right ventricle –> Pulmonary valve –> Pulmonary artery –> _______ –> Pulmonary vein –> _______ –> Mitral valve –> Left ventricle  –> Aortic valve –>  _______

Although there are many genes that modify the expression of…

Although there are many genes that modify the expression of eye colour in humans, in general, dark eye colour is dominant to blue eye colour. Freckles are also dominant to no freckles. These genes are located on different chromosomes. If one parent is blue-eyed with no freckles and the other is heterozygous for dark eye colour and freckles, which ratio of phenotypes may be seen in the offspring?