Imagine that horn color in Hodags (folkloric creatures of Wisconsin) is controlled by a single gene. You mate a Hodag homozygous for a bright orange horns (COCO) with a Hodag homozygous for ivory horns (CICI). Numerous offspring are produced, all with pale orange horns. This pattern of inheritance of horn color can best be described as
A. codominance.
B. environmental effects on phenotype.
C. recombination.
D. incomplete dominance.
E. complete dominance.
Answer: D
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Identifying carboxysomes in a bacterium suggests it
A) contains the reverse citric acid cycle. B) has a deficient Calvin cycle and accumulated CO2. C) is in a carboxylic acid rich environment and is storing excess quantities for potentially harsh conditions. D) will use the Calvin cycle convert the concentrated CO2 into biomass.