Polyglutamine (polyQ) diseases:
A. result from template slippage during replication.
B. result when CAG repeats increase above the disease threshold.
C. is a triple expansion disease.
D. include Huntington disease and fragile X syndrome.
E. All of the statement choices are correct.
E
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Protection of the embryo is a major requirement for land plants given there is no aquatic environment in which to keep it safe from desiccation and other environmental hazards. Which structure, in both seed and seedless plants, provides the protection and nutrients needed by the embryo as it develops?
a. sporangium b. gametangia c. female gametophyte d. archegonium
The first antibody secreted upon exposure to an antigen.
What will be an ideal response?
Studying pedigrees enables human geneticists to predict how traits that are determined by phenotype
are inherited. _________________ Indicate whether the statement is true or false.
All of the following features are true of primates except
A. they have prehensile tails. B. they belong to the order containing lemurs, monkeys, and apes. C. they are mammals with grasping fingers and toes. D. they have binocular vision.