If a pea plant is heterozygous for yellow seeds (Yy), which gametes could it produce? Select one:
a. y only
b. YYyy
c. Y or y
d. Y only
e. Yy
c. Y or y
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Eukaryotic and prokaryotic organisms differ in how they process genetic information. Which statements best explain one of these differences?
A. In prokaryotes, translation of the mRNA begins before transcription is complete. In eukaryotes, transcription and modification of the mRNA is completed before translation begins. B. In prokaryotes, genes are transcribed directly into polypeptides. In eukaryotes, genes are transcribed into RNA which is used to assemble polypeptides. C. In prokaryotes, translation occurs before genes are transcribed into mRNA. In eukaryotes, genes are transcribed into mRNA which is then translated into polypeptides. D. In prokaryotes, introns are removed before genes are transcribed into mRNA. In eukaryotes, introns are removed after genes are transcribed into mRNA.
The type of DNA repair that corrects errors due to oxidative damage by replacing one to five nucleotides is
A) mismatch repair. B) base excision repair. C) roto-rooter repair. D) photoreactivation.
In nerve impulse transmissions, the neuron sending the message across the synapse is called the
A. postsynaptic cell. B. Schwann cell. C. presynaptic cell. D. motor cell. E. receptor neuron.
A retrovirus uses ________ to make a DNA copy of RNA
A) ras proteins B) CDKs C) cyclins D) reverse transcriptase