A cross between two individuals identically heterozygous for one gene is called ______.
A. dihybrid cross
B. monohybrid cross
C. testcross
D. Punnett square
E. hybridization
Answer: B
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A DNA molecule used to carry a foreign gene into a host organism is called a
A. plasmid. B. probe. C. vector. D. blot.
________ is a bacterial plasmid vector.
A. Lambda B. T4 DNA ligase C. SV40 D. pUC19
Energy flow is one-way because ____
a. all of the energy in an ecosystem stays constant b. the amount of energy a producer harvests is equal to the amount of energy consumers consume c. with each energy transfer, some energy escapes as heat d. energy cannot be created but it can be destroyed e. there is only one form of energy
What is the key difference in defining "obese" and defining "overweight"?
A) An overweight person always carries weight as excess fat. B) An obese person always carries weight as excess fat. C) An obese person always carries weight as excess muscle. D) The two terms mean the same thing.