A(n) ____ is an offspring of a cross between
two individuals that breed true for different
forms of a trait
a. homozygote
b. recessive
c. hybrid
d. phenotype
e. genotype
C
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Sickle cell anemia is caused by a defect in the
A. oxygen-carrying pigment hemoglobin. B. ability of the blood to clot. C. ability of red blood cells to fight infection. D. chloride ion transport protein.
NAD in its reduced form is abbreviated as
A. NADH. B. NAD. C. NAD-. D. NADP.
Research has shown that commercial fisheries place selective pressure on fish populations by
harvesting mostly the ____ fish, resulting in ____.
a. young; aging populations b. larger; maturity at smaller sizes c. smaller; maturity at larger sizes d. prereproductive; declining birth rates e. postreproductive; no change in population size
The first successful outcome of gene therapy was in a case of a young girl suffering from
____________________ who was supplied with copies of the ADR gene. Fill in the blank(s) with the appropriate word(s).