Question:What does codominance mean in genetics? 1.Both alleles are dominant and are expressed.
2.Both alleles are recessive and are not expressed.
3.The alleles are neither dominant nor recessive.
4.Each allele is both dominant and recessive.

Option 1

that can give nice mixtures of colors in flowers, like alleles for white and red are expressed, and mixed to pink seen by the human eye

i think its the first one

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint