In a 3-point test cross, the least common offspring phenotypes always result from the ____________
a) non-recombinant gametes
b) recombinant gametes from a single cross over between the first and middle gene
c) recombinant gametes from a single cross over between the middle and last gene
d) gametes from double crossovers
Ans: d) gametes from double crossovers
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In C3 plants, the __________ are typically closed at night and open during the daytime to allow for gas
exchange. a. stomata b. epidermis c. spongy mesophyll d. grana e. cuticles
Kelp, a seaweed that is anchored to the seafloor by rootlike structures and can grow to heights of 60 m, is a kind of
A) water mold. B) brown alga. C) green alga. D) diatoms.
Lice and their relationship with mammals is an example of what type of relationship?
A. commensalism B. parasitism C. mutualism D. predator-prey relationship
Mammals and amphibians are the only vertebrates that produce urine that is hypertonic to their body fluids.
Answer the following statement true (T) or false (F)