What is the greatest benefit of having used a testcross for this experiment?
A) The homozygous recessive parents are obvious to the naked eye.
B) The homozygous parents are the only ones whose crossovers make a difference.
C) The phenotypes of the progeny reveal the allelic content of the gamete from the heterozygous parent.
D) All of the progeny will be heterozygous.
C
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Muscle fibers generate maximum force:
A. at intermediate lengths. B. when pulled to long lengths before contraction. C. when contracting at short lengths. D. when the myosin filaments contact the Z discs. E. when the overlap between actin and myosin is minimal.
Nutrients are often transformed and cycled by oxidation-reduction reactions that can change the chemical and physical characteristics of the nutrients.
Answer the following statement true (T) or false (F)
Allergies run in families because
A. immunoglobulins pass from mother to fetus. B. immunoglobulins pass through breast milk. C. the relative production of IgE is inherited. D. the variable region of antibodies is genetically determined.
The strand of DNA that is not transcribed is called the ________ strand.
A. template B. coding C. noncoding D. complementary