Enzymes speed up reactions by
A. raising activation energy.
B. producing heat.
C. reducing entropy.
D. lowering activation energy.
E. raising activation energy AND reducing entropy.
D
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A developing organism's failure to produce muscle tissue is most likely due to
A) underdevelopment of the ectoderm. B) underdevelopment of the endoderm. C) fibroblast growth factor receptor mutations. D) adenylate cyclase mutations. E) missing chromosomes.
If a pedigree of several generations shows only females affected by a particular trait, it cannot be a(n) ____ trait
a. autosomal recessive b. autosomal dominant c. Y-linked d. X-linked recessive e. X-linked dominant
If two or more of the genes are linked, what map distance separates them?
In peas, tall (T) is dominant to short (t), red flowers (R) is dominant to white flowers (r), and wide leaves (W) is dominant to narrow leaves (w). A tall plant that has red flowers and wide leaves is crossed to a short plant that has white flowers and narrow leaves. The resulting progeny are shown in the table.
A) 4 m.u.
B) 12 m.u.
C) 24 m.u.
D) 50 m.u.
E) None of the genes are linked to each other.
If an organism has two non-identical versions of a gene, the one that is not expressed in the organism is called the __________
Fill in the blank(s) with the appropriate word(s)