If a scientist wants to perform a monohybrid cross for stem length in pea plants, which of the following crosses should be performed?
a) Tt x TT
b) Tt x tt
c) TT x TT
d) Tt x tt
e) Tt x Tt
Answer: e) Tt x Tt
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Answer the following statement true (T) or false (F)
Alternate forms of the same gene are called
A. homologues. B. genotypes. C. cofactors. D. alleles.
Our sense of balance depends most directly on
A. the vestibular system. B. the auditory system. C. the visual system. D. mechanoreceptors in our hands and feet. E. stretch receptors in our skeletal muscles.
Water transport from roots to leaves occurs mainly because of _____
a. pressure flow b. differences in source and sink solute concentrations c. the pumping force of xylem vessels d. transpiration, tension, and cohesion of water e. pressur flow and differences in source and sink solute concentrations