Gene mutation produces new genes, and gene recombination produces new genotypes. What's the difference between gene and genotype?

Simply put, a "gene" is a single "A", "A", "B" and "B". Capitalized genes are dominant genes and lowercase genes are recessive genes. And "Aa" is a pair of alleles. Genotype is a free combination of different genes such as A, A, B, B, etc. How many pairs of the same alleles (such as "aa", "Aa" and "AA" or four A's) in an individual are different for different organisms.

If we insist on linking "gene" with "genotype", it is said that "gene" constitutes "genotype".

Gene mutation produces new genes, and the genotype is bound to change. Gene recombination produces new genotypes, but they are still composed of the original genes.

There is one thing I don't agree with in "An Empty Bouquet _". Gene mutation doesn't mean that new traits will appear in the organism, and it doesn't necessarily mean that new traits will appear. If it is double dominant, it will become heterozygote after mutation, or dominant (a few special ones are counted separately).