The different gene combinations might determine how vulnerable people are and at what age they contract diabetes.

However, the frequency of recombination is actually not the same for all gene combinations.

As with all other forms of sexual reproduction, hermaphroditism ensures that new gene combinations are passed to further generations.

In times of stress, offspring produced by sexual reproduction may be fitter as they have new, possibly beneficial gene combinations.

He worked on computer science and evolution, introducing new ideas of how mating generates new gene combinations.

It's important to have good gene combinations.

It deconstructs complex genotypes, allowing the creation of novel gene combinations.

But natural selection operating on small isolated populations quickly results in gene combinations unlike those found in the ancestral population.

Thus relevant gene combinations "fill in" behind the behavioral advance.

The trouble is that we cannot altogether control gene combinations and intrauterine influences.