Genes encoding the blood proteins myoglobin and hemoglobin are derived from a common gene ancestor. These proteins both occur in humans. The genes for myoglobin and hemoglobin are
A. analogs.
B. topologs.
C. paralogs.
D. orthologs.
E. pentalogs.
C. paralogs.
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Homologous pairs of chromosomes align opposite of each other at the equator of a cell during _____
A) mitosis metaphase B) meiosis metaphase I C) meiosis telophase II D) meiosis metaphase II
What happens when the cAMP-CAP complex binds the CAP site near the lac promoter?
A. Transcription rate decreases. B. Transcription rate increases. C. RNA polymerase binds to the promoter. D. RNA polymerase binds to the promoter and transcription rate decreases. E. RNA polymerase binds to the promoter and transcription rate increases.
Upon finding a carcass, a raven will only call and attract other ravens to the food source if the ____
a. nearby ravens are relatives b. food source is large and plentiful c. food is found in a resident pair's territory d. food is found in his own territory e. food is being consumed by an animal of another species
The pairing of chromosomes and crossing over occur during _____ of meiosis
a. metaphase I b. anaphase II c. prophase I d. prophase II e. more than one of these