You are working with a gene associated with an essential pathway that is necessary at two time points in an organism's lifetime. With regard to gene regulation, you would expect the gene to be
A) constitutive.
B) associated with response to distinct events.
C) induced by particular signals.
D) repressed by particular signals.
E) associated with response to distinct events through induction and repression signals.
Answer: E
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In a cross between a true-breeding plant bearing the dominant traits of smooth, yellow seeds and a true-breeding plant bearing the recessive traits of wrinkled, green seeds, the offspring (F1) are all smooth and yellow and their genotype is ____
a. SSYY b. ssyy c. SsYy d. ssYY e. SSyy
Which of the following properties of RNA is most directly responsible for its ability to form complex shapes?
A) the presence of uracil instead of thymine B) the fact that RNA is primarily double-stranded C) the relative instability of RNA compared to DNA D) the fact that RNA is primarily single-stranded E) the substitution of deoxyribose in DNA with ribose in RNA
__________ species of many plants (and a few
animals) originated by chromosome doublings and hybridizations. Fill in the blank(s) with the appropriate word(s).
Genetics is central to biology because genes and their functions form the basis of all life processes
Indicate whether the statement is true or false