Background: Another example of incomplete dominance is with sickle cell anemia, a disease in which a blood protein called hemoglobin is produced incorrectly. This causes the red blood cells to have a sickle shape, making it difficult for these misshapen cells to pass through the smallest blood vessels. A person that is homozygous recessive ( ss ) for the sickle cell trait will have red blood cells that all have the incorrect hemoglobin. A person who is homozygous dominant ( SS ) will have normal red blood cells.

Situation: Doctors studied  the blood of 2 sisters, Ann and Julie. Ann had sickle cell anemia, Julie did not.

Question: Which sister had more hemoglobin that was produced incorrectly?
Answer: Ann

Situation: Doctors studied  the blood of 2 sisters, Ann and Julie. Ann had sickle cell anemia, Julie did not.

Question: Which sister had less hemoglobin that was produced incorrectly?
Answer: Julie

Situation: Doctors studied  the blood of 2 sisters, Ann and Julie. Ann had sickle cell anemia, Julie did not.

Question: Which sister had fewer cells that had a sickle shape?
Answer: Julie

Situation: Doctors studied  the blood of 2 sisters, Ann and Julie. Ann had sickle cell anemia, Julie did not.

Question: Which sister had more cells that had a sickle shape?
Answer: Ann

Situation: Doctors studied  the blood of 2 sisters, Ann and Julie. Ann had sickle cell anemia, Julie did not.

Question: Which sister had more cells that had a difficulty passing through the smallest blood vessels?
Answer: Ann

Situation: Doctors studied  the blood of 2 sisters, Ann and Julie. Ann had sickle cell anemia, Julie did not.

Question: Which sister had fewer cells that had a difficulty passing through the smallest blood vessels?
Answer: Julie

Situation: Doctors studied  the blood of 2 sisters, Ann and Julie. Ann had sickle cell anemia, Julie did not.

Question: Which sister was homozygous recessive ( ss ) for the sickle cell trait?
Answer: Ann

Situation: Doctors studied  the blood of 2 sisters, Ann and Julie. Ann had sickle cell anemia, Julie did not.

Question: Which sister was not homozygous recessive ( ss ) for the sickle cell trait?
Answer: Julie

Situation: Doctors studied  the blood of 2 sisters, Ann and Julie. Ann had sickle cell anemia, Julie did not.

Question: Which sister was not homozygous dominant ( SS ) for the sickle cell trait?
Answer: Ann

Situation: Doctors studied  the blood of 2 sisters, Ann and Julie. Ann had sickle cell anemia, Julie did not.

Question: Which sister was homozygous dominant ( SS ) for the sickle cell trait?
Answer: Julie

Situation: Two brothers went to take a blood test. Ned had sickle cell anemia, while Ted didn't have that disease. Their mother took Ned to a specialist.

Question: Which brother displayed incomplete dominance?
Answer: Ned

Situation: Two brothers went to take a blood test. Ned had sickle cell anemia, while Ted didn't have that disease. Their mother took Ned to a specialist.

Question: Which brother didn't display incomplete dominance?
Answer: Ted

Situation: Two brothers went to take a blood test. Ned had sickle cell anemia, while Ted didn't have that disease. Their mother took Ned to a specialist.

Question: Which brother had a blood protein called hemoglobin produced incorrectly?
Answer: Ned

Situation: Two brothers went to take a blood test. Ned had sickle cell anemia, while Ted didn't have that disease. Their mother took Ned to a specialist.

Question: Which brother had a blood protein called hemoglobin produced correctly?
Answer: Ted

Situation: Two brothers went to take a blood test. Ned had sickle cell anemia, while Ted didn't have that disease. Their mother took Ned to a specialist.

Question: Which brother had sickle shaped blood cells?
Answer: Ned

Situation: Two brothers went to take a blood test. Ned had sickle cell anemia, while Ted didn't have that disease. Their mother took Ned to a specialist.

Question: Which brother didn't have any sickle shaped blood cells?
Answer: Ted

Situation: Two brothers went to take a blood test. Ned had sickle cell anemia, while Ted didn't have that disease. Their mother took Ned to a specialist.

Question: Which brother had misshapen cells that had difficulty passing through the smallest blood vessels?
Answer: Ned

Situation: Two brothers went to take a blood test. Ned had sickle cell anemia, while Ted didn't have that disease. Their mother took Ned to a specialist.

Question: Which brother didn't have misshapen cells that had difficulty passing through the smallest blood vessels?
Answer: Ted

Situation: Two brothers went to take a blood test. Ned had sickle cell anemia, while Ted didn't have that disease. Their mother took Ned to a specialist.

Question: Which brother was homozygous recessive?
Answer: Ned

Situation: Two brothers went to take a blood test. Ned had sickle cell anemia, while Ted didn't have that disease. Their mother took Ned to a specialist.

Question: Which brother was not homozygous recessive?
Answer: Ted

Situation: Two sisters named Mary and Ann went in for a blood test and found out that Mary had sickle cell anemia. Ann was normal.

Question: Which sister had incomplete dominance?
Answer: Mary

Situation: Two sisters named Mary and Ann went in for a blood test and found out that Mary had sickle cell anemia. Ann was normal.

Question: Which sister did not have incomplete dominance?
Answer: Ann

Situation: Two sisters named Mary and Ann went in for a blood test and found out that Mary had sickle cell anemia. Ann was normal.

Question: Which sister did not have a disease in which a blood protein called hemoglobin is produced incorrectly?
Answer: Ann

Situation: Two sisters named Mary and Ann went in for a blood test and found out that Mary had sickle cell anemia. Ann was normal.

Question: Which sister had a disease in which a blood protein called hemoglobin is produced incorrectly?
Answer: Mary

Situation: Two sisters named Mary and Ann went in for a blood test and found out that Mary had sickle cell anemia. Ann was normal.

Question: Which sister did not have a disease that causes the red blood cells to have a sickle shape?
Answer: Ann

Situation: Two sisters named Mary and Ann went in for a blood test and found out that Mary had sickle cell anemia. Ann was normal.

Question: Which sister had a disease that causes the red blood cells to have a sickle shape?
Answer: Mary

Situation: Two sisters named Mary and Ann went in for a blood test and found out that Mary had sickle cell anemia. Ann was normal.

Question: Which sister was homozygous recessive?
Answer: Mary

Situation: Two sisters named Mary and Ann went in for a blood test and found out that Mary had sickle cell anemia. Ann was normal.

Question: Which sister wasn't homozygous recessive?
Answer: Ann

Situation: Two sisters named Mary and Ann went in for a blood test and found out that Mary had sickle cell anemia. Ann was normal.

Question: Which sister wasn't homozygous dominant?
Answer: Mary

Situation: Two sisters named Mary and Ann went in for a blood test and found out that Mary had sickle cell anemia. Ann was normal.

Question: Which sister was homozygous dominant?
Answer: Ann