In a Hardy-Weinberg equilibrium, as the frequencies of homozygous genotypes increase, the frequency of the
heterozygous genotype _____.
a. doubles
b. is reduced by a factor of 10
c. increases linearly
d. decreases linearly
e. remains the same
b
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Which of the following intermediate filament proteins is incorrectly matched with the cell type in which it is found?
A) keratin - epithelial cells B) desmin - smooth muscle cells C) vimentin - mesenchymal cells D) nestin - connective tissue cells E) GFA protein - glial cells
Plants produce steroids called phytosterols, which have various functions in plant physiology. Some phytosterols are thought to have a defensive function, however, specifically in repelling insect herbivores
How might plant-derived steroids help protect plants from insect attack?
Compared to a normal cell, a cancer cell generally divides
A) ten times faster than a normal cell. B) four times faster than a normal cell. C) two times faster than a normal cell. D) at the same rate as a normal cell. E) much slower than a normal cell.
Sometimes the gene for blue eye color is in the same gamete as the gene for curly hair, but they are in different gametes just as often. Why?
A. crossing-over B. independent assortment C. fertilization D. segregation