Once the lac repressor binds to the lac operator site, RNA polymerase is prevented from transcribing the
A. galactosidase gene.
B. regulatory gene.
C. galactoside transacetylase gene.
D. galactosidase and galactoside transacetylase genes.
E. galactosidase and regulatory genes.
D. galactosidase and galactoside transacetylase genes.
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A woman with normal blood clotting mates with a man who has hemophilia. Their first child is a boy who has
hemophilia. Tests show that the father and son both have the same form of hemophilia, that it is X-linked, and that the boy has normal genetic inheritance. You can predict that if the couple has more children together, it is likely that ____.
a. all of the children will have hemophilia b. half of the boys and none of the girls will have hemophilia c. none of the other children should have hemophilia d. all of the boys and half of the girls will have hemophilia e. half of the boys and half of the girls will have hemophilia
Thigmotropism is a growth response to ____
a. light b. day length c. contact with a solid object d. circadian rhythms e. gravity
Name two individuals who provided the conceptual basis for our present understanding that genes are on chromosomes
What will be an ideal response?
The breakdown of tooth enamel is called tooth decay, cavities, or dental _______
Fill in the blank(s) with the appropriate word(s).