What is the term for two genes from two different species that are similar in sequence and serve the same function in each species?
A. Related genes
B. Paralogs
C. Gene family
D. Orthologs
D
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Sponges can have skeletons made of all these materials except:
a. silica. b. calcium carbonate. c. starch. d. spongin. e. protein.
When Gregor Mendel first started his genetics experiments, he ____
a. knew about the existence of genes b. knew that some plants "breed true" c. knew that genes were responsible for observable traits d. allowed the pea plants to self-fertilize e. expected all true breeding crosses to produce offspring with intermediate phenotypes
Refer to the accompanying figure. The structure labeled as 7 in the figure of the tryptophan operon is a(n):
a. active repressor protein. b. inactive repressor protein. c. active RNA polymerase. d. inactive RNA polymerase. e. ribosome.
Which of the following variations of the sentence "Where is the cat?" is most like a chromosomal inversion?
A) Where is cat? B) Where is the the cat? C) Where the is cat? D) Where is cat the the cat?