Question 1

_____ refers to a form of mental retardation involving an abnormally small brain.

Accepted Answer

Microencephaly is a condition where the brain is abnormally small, leading to intellectual disability and developmental delays. It can be caused by genetic mutations or exposures to toxins during pregnancy.

Question 2

Which of the following is the vascular organ that links the fetus to the mother's uterus?

Accepted Answer

The placenta is the vascular organ that links the fetus to the mother's uterus. It allows the exchange of nutrients, gases, and waste products between the mother and the developing fetus.

Question 3

_____ uses a powerful magnet and radio images to generate detailed images of the body's organs and structures.

Accepted Answer

MRI (Magnetic Resonance Imaging) uses a powerful magnet and radio waves to generate detailed images of the body's organs and structures, making it the best choice among the given options. Ultrasound sonography can also generate detailed images, but it uses sound waves instead of magnets and radio waves. Triple screen and amniocentesis are not imaging techniques, but rather prenatal tests used to screen for genetic abnormalities.

Question 4

Approximately,_____ African Americans is a carrier for sickle-cell anemia.

Accepted Answer

Approximately 1 in 10 African Americans is a carrier for sickle-cell anemia, meaning they have the sickle cell trait.

Question 5

Patrick suffers from _____,a genetic abnormality in which delayed blood clotting causes internal and external bleeding.

Accepted Answer

Hemophilia is a genetic abnormality that affects blood clotting, causing delayed clotting and increased risk of bleeding, both internally and externally. Phenylketonuria, sickle-cell anemia, and Tay-Sachs disease are all genetic disorders, but they do not involve blood clotting abnormalities.

Question 6

Which of the following is a gene-linked abnormality?

Accepted Answer

Phenylketonuria (PKU) is a gene-linked abnormality that is caused by a mutation in the gene that codes for an enzyme involved in the breakdown of the amino acid phenylalanine. This results in a buildup of phenylalanine in the body, which can cause intellectual disabilities and other serious health problems if left untreated. Down syndrome, Turner syndrome, and Klinefelter syndrome are all caused by chromosomal abnormalities, rather than gene mutations.

Question 7

Mateo is on a special diet because his parents are aware that he cannot metabolize phenylalanine,an amino acid.Buildup of this amino acid in his system could result in mental retardation.Mateo has:

Accepted Answer

Phenylketonuria (PKU) is a metabolic disorder in which the body cannot properly process the amino acid phenylalanine, leading to its accumulation and potentially causing intellectual disability if left untreated. The fact that Mateo is on a special diet to avoid this buildup indicates that he likely has PKU. Down syndrome, sickle-cell anemia, and Huntington's disease are all genetic conditions that affect different aspects of health and development, but none of them are specifically related to issues with phenylalanine metabolism.

Question 8

Which of the following is true of phenylketonuria?

Accepted Answer

Phenylketonuria (PKU) is a genetic disorder caused by a mutation in a gene that codes for an enzyme needed to break down the amino acid phenylalanine. It is inherited in an autosomal recessive pattern, meaning that an affected individual must inherit a mutated copy of the gene from both parents in order to develop the disorder.

Question 9

Benny has been diagnosed with a gene-linked abnormality characterized by deceleration of mental and physical development caused by an accumulation of lipids in the nervous system.He has been put on medication and a special diet,but his family has been told that he will probably not live beyond the age of five.Benny is suffering from:

Accepted Answer

The symptoms described in the scenario match those commonly associated with Tay-Sachs disease, a genetic disorder characterized by the accumulation of lipids in the nervous system. Individuals with this condition experience a loss of motor skills and cognitive abilities, and typically do not survive beyond early childhood. Treatment options are limited and focus on managing symptoms.

Question 10

Joshua,a two-year-old,has been diagnosed with _____,a blood disorder that limits the body's oxygen supply and can cause joint swelling and heart and kidney failure.This genetic disorder can be treated through penicillin,pain medication,antibiotics and blood transfusions.His doctor has indicated that a study named Baby HUG may offer a better drug in the future.

Accepted Answer

Sickle-cell anemia is a blood disorder that limits the body's oxygen supply and can cause joint swelling and heart and kidney failure. It can be treated through penicillin, pain medication, antibiotics, and blood transfusions. Baby HUG, a study mentioned by the doctor, is a clinical trial aimed at finding a more effective drug for sickle-cell anemia. Spina bifida, Tay-Sachs disease, and Huntington's disease are not related to the symptoms or treatment mentioned in the passage.

Question 11

Lindsay's body does not produce enough insulin,causing an abnormal metabolism of sugar.She is receiving insulin treatment.Lindsay has:

Accepted Answer

The description of the problem indicates that Lindsay has diabetes, which is characterized by the body's inability to properly regulate blood sugar levels without intervention such as insulin treatment. Spina bifida, hemophilia, and phenylketonuria are different health conditions with different causes and symptoms.

Question 12

Gwendolyn is having a prenatal test where her doctor uses high-frequency sound waves directed into her abdomen to check her fetus.She is most likely having a(n):

Accepted Answer

The use of high-frequency sound waves to check a fetus is a hallmark of ultrasound sonography.

Question 13

Penny has been diagnosed with cystic fibrosis.Which of the following would be an appropriate course of treatment for her?

Accepted Answer

Cystic fibrosis is a genetic disorder that affects the respiratory and digestive systems. It causes thick mucus to build up in the lungs and other organs, making it difficult to breathe and digest food. The most appropriate course of treatment for cystic fibrosis includes physical and oxygen therapy to help clear the lungs, synthetic enzymes to aid in digestion, and antibiotics to treat infections. Other treatments such as medication for pain, blood transfusions, and hydroxyurea are not typically used in the treatment of cystic fibrosis. Insulin treatment is used for diabetes and is not relevant to cystic fibrosis. Blood transfusions/injections may be used in certain cases, but it is not a primary treatment option.

Question 14

Identify a risk related to the use of chorionic villus sampling (CVS)as a prenatal diagnostic test.

Accepted Answer

Chorionic villus sampling (CVS) is associated with a risk of limb deformities, particularly when performed before 10 weeks of gestation.

Question 15

Paul suffers from hemophilia.Suggest an appropriate treatment option for Paul's condition.

Accepted Answer

Blood transfusions or injections are the most appropriate treatment for hemophilia. This is because hemophilia is a blood disorder that results in a lack of clotting factors in the blood. Therefore, injecting clotting factors into the bloodstream can help control bleeding and prevent further complications. Insulin treatment is not relevant to hemophilia, and physical therapy and oxygen therapy are not effective treatments for the condition.

Question 16

Tamera has a genetic disorder where her red blood cells take on a hook shape instead of the normal disk shape.The doctors tell Tamera's parents that she has _____,and that this condition also provides her with a resistance to malaria.

Accepted Answer

Tamera has sickle-cell anemia, which is a genetic disorder where red blood cells take on a hook shape. This condition also provides resistance to malaria, as the malaria parasite is not able to thrive in these abnormal red blood cells. Tay-Sach's disease and Huntington's disease are both genetic disorders but do not involve abnormal red blood cells. Leukemia is a cancer of the blood and does not involve abnormal blood cell shapes.

Question 17

_____ is a gene-linked abnormality in which the central nervous system deteriorates,producing problems in muscle coordination and mental deterioration.

Accepted Answer

Huntington's disease is a gene-linked disorder that affects the central nervous system, causing problems in muscle coordination and mental function. It is caused by a mutation in the HTT gene, and symptoms usually develop in middle age. There is currently no cure for the disease.

Question 18

Esperanza is having a prenatal test to remove a small sample of the placenta for genetic testing.Identify the test that her doctor is performing.

Accepted Answer

Chorionic villus sampling (CVS) is a prenatal test that involves removing a small sample of the placenta for genetic testing. This test is usually performed between 10 and 13 weeks of pregnancy and can be used to detect a variety of genetic disorders. Amniocentesis is another prenatal test that involves removing a sample of amniotic fluid for genetic testing, but it is typically performed later in pregnancy (around 15-20 weeks). Noninvasive prenatal diagnosis (NIPD) is a newer type of prenatal testing that can be done using a blood sample from the mother, but it is not used for routine genetic testing. Triple screen is a blood test that is used to screen for certain birth defects, but it does not involve genetic testing of the placenta.

Question 19

Mary and Jim are expecting a child and prenatal diagnostic procedures have confirmed that the fetus has _____,a neural tube disorder that causes brain and spine abnormalities.Their physician has explained that this gene-linked abnormality could be treated with corrective surgery at birth,orthopedic devices,and physical or medical therapy.

Accepted Answer

Spina bifida is a neural tube disorder that causes brain and spine abnormalities. It is treatable with corrective surgery at birth,orthopedic devices, and physical or medical therapy. The other options (Tay-Sachs disease, Phenylketonuria, and Huntington's disease) are genetic disorders but do not involve neural tube defects and are not treatable with corrective surgery or orthopedic devices.

Question 20

Samantha has been diagnosed with _____,which is a glandular dysfunction that interferes with mucus production.

Accepted Answer

Cystic fibrosis is a genetic disorder that affects the glands that produce mucus and sweat. It causes the mucus to become thick and sticky, which can clog airways and ducts, leading to breathing problems, digestive issues, and other complications.

Quiz 2: Biological Beginnings