Genes located in cells in different regions of the
body during embryonic development may
a. be turned on and off.
b. never be turned on.
c. be turned on and left on.
d. be activated for only a short time in one cell and
a long time in another cell.
e. do all of these.
Answer: e
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What will be an ideal response?
. Humans are the only reservoir for varicella-zoster
Indicate whether this statement is TRUE or FALSE.
Geneticists construct linkage maps of chromosomes by
A) correlating a phenotype to an observable chromosomal abnormality. B) determining the number of crossovers between genes on different chromosomes. C) calculating the percent recombination between two genes on the same chromosome. D) observing the number of genes on a chromosome.
All evolutionarily meaningful characters evolve at the same rate
Indicate whether the statement is true or false.