Use the entire population for breeding, but increase the amount of fertilizer and light. Select seeds from only those plants whose height exceeds the mean for the generation. Select plants for breeding that are closest to the mean height of the population. Randomly select five plants for breeding.

Cattle with brown fur and cattle with white fur will produce a reddish roan calf . when examined closely, the calf show about an even number of brown hairs and white hairs that give a reddish appearance when viewed from far away. the fact that both the brown fur allele and the white fur allele are expressed equally in the offspring is an example of