Male bees develop from unfertilized eggs, while female bees develop from fertilized eggs. The body color of bees is brown relative to black, and the gene controlling this relative character is located on the autosome. The existing brown drones hybridize with the black queen bee, so the body color of F 1 cannot be ().
A. all brown B. number of brown individuals: number of black individuals =3: 1.
C. Queen bees and worker bees are all brown, and drones are all black. D. Queen bees and worker bees are all black, and drones are all brown.
Standard answer: D.
The answer you provided is wrong and C is right.
Suppose that the brown gene is B, then black is B, the black queen bee is bb, the eggs produced are B, the brown drone is B, and the sperm produced by pseudo-meiosis is B, then the offspring drone develops from the unfertilized egg B, the genotype is B, and the queen bee and the worker bee develop from the fertilized egg Bb, the genotype is Bb, and the phenotype is brown. There is absolutely no possibility of d, let alone the first two items.
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