At an underdominant locus, how will allele frequencies change through time?
a. The homozygote with the greatest fitness advantage will have its allele fixed.
b. A balanced polymorphism of both alleles will be maintained at a stable equilibrium.
c. The homozygote with the lowest fitness advantage will have its allele lost.
d. One or the other allele will be lost depending on their initial frequencies.
e. Both alleles will be lost.
D
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A. dermal tissue B. vascular tissue C. woody stem D. root and stem tips E. stem tip only
Which statement is a part of the first law of thermodynamics?
a. Energy can be neither created nor destroyed.
b. Energy cannot be transformed. c. The entropy of the universe is constant. d. The entropy of the universe is decreasing. e. Potential energy is the energy of motion.
Deafness is caused by recessive mutations in any one of at least five genes. Two deaf individuals have nine children, all of whom have normal hearing. Which of the following can you conclude?
A) The parents have mutations in the same gene. B) The parents have mutations in different genes. C) An epistatic interaction has occurred. D) The mutations are codominant to the normal allele. E) The mutations are incompletely dominant to the normal allele.
The adaptation that allows insects to blend into the background might be represented by:
A. the grass in a yard. B. the color of a building. C. the instar of grasshoppers. D. the leaves on a tree. E. tinted windows in a car.