Most hospitals routinely test all newborns for an autosomal recessive disorder in which an enzyme in amino acid metabolism is NOT produced. In this disorder, lack of the enzyme leads to a buildup of compounds that damage brain tissue, possibly leading to mental retardation, unless a restricted diet is followed. What is the name of this disorder?

a. Duchenne muscular dystrophy
b. achondroplasia
c. sickle cell anemia
d. phenylketonuria


Answer: d. phenylketonuria

Biology & Microbiology

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Which genetic diseases involve defects in DNA repair that affect cell division?

a. Gaucher disease and Werner syndrome b. Kearns-Sayre syndrome and progeria c. progeria and Gaucher disease d. Gaucher disease and cystic fibrosis e. progeria and Werner syndrome

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To test Mendel's Law of Segregation, the experimenter needs a minimum of two contrasting forms of a gene

Indicate whether the statement is true or false

Biology & Microbiology

Cells located in red bone marrow that give rise to platelets, red blood cells, and white blood cells are called ________ cells

Fill in the blank(s) with correct word

Biology & Microbiology

Gaps in fossil record _____________.

a. demonstrate our inability to date geological sediments b. are expected since the probability that any organism will fossilize is extremely low c. have not been filled in as new fossils have been discovered d. weaken the theory of evolution

Biology & Microbiology