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

Biology & Microbiology

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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.

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NAD in its reduced form is abbreviated as

A. NADH. B. NAD. C. NAD-. D. NADP.

Biology & Microbiology

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

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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).

Biology & Microbiology