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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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
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.