Genes that are close together in the same chromosome:
A. tend to assort independently.
B. tend to be transmitted together.
C. assort primarily independently, but will,
very rarely, be transmitted together.
D. are present only on X chromosomes.
E. tend to be transmitted together, and are
present only on X chromosomes.
B
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You extract DNA from an E. coli cell and observe it is hemi-methylated. Which strand of DNA is older?
A. The methylated strand B. The strand that is not methylated C. Neither—they are the same "age."
Tinkering with the genetics of animals
a. does not raise ethical questions. b. violates the laws of nature. c. can be viewed as an extension of thousands of years of acceptable barnyard practices. d. will inevitably result in the elimination of natural species. e. is not considered an acceptable scientific endeavor.
A gemma is a sexual reproductive structure produced by certain liverworts
____________________ Indicate whether the statement is true or false.
A section of a neuron's membrane becomes temporarily positive on the inside when:
A) ion channels open and potassium ions rush in. B) negatively charged proteins exit the cell. C) neurotransmitters enter the cell. D) ion channels open and sodium ions rush in.