Butterflies have an X-Y sex determina- tion system that is different from that of flies or humans. Female butterflies may be either XY or XO, while but- terflies with two or more X chromosomes are males. This photograph shows a tiger swal- lowtail gynandro- morph, which is half male (left […]

Under certain conditions, the side chains (R-groups) of aspartic acid and lysine can form an ionic bond with one another. The pK for the ionizing groups on these side chains is 3.86 for aspartic acid and 10.53 for lysine. A) Draw the dominant structure of each of these amino acid […]

1) If a man of blood group AB marries a woman of blood group A whose father was of blood group O, to what different blood groups can this man and woman expect their children to belong?2)Shown bellow are the results of some of Drosophila crosses. State a null hypothesis […]

RESPIRATORY SYSTEM Define the following processes: Pulmonary ventilation (Breathing) External respiration Internal respiration List the muscles involved in quiet and forceful (active) inspiration and expiration. What is the function of Type II septal cells? Describe how oxygen and carbon dioxide are transported in the blood. What parts of the brain […]