gene

We all know we are the product of our genes, what are all the steps from gene to us?

It's a recessive gene carried down through families.

For example, the common housefly reproduces by laying several thousand eggs, so each fly gene gets copied thousands of times.

If it seems difficult to conceive how major changes could occur rapidly, consider this: an alteration of a single gene in files is enough to turn a normal fly with a single pair of wings into one that has two pairs of wings.

But people who have a mutation in that gene cannot taste the bitterness.

Well, this guy seems to have discovered a particular gene that actually makes it possible for people to taste the bitterness in certain green vegetables.

Completely isolated on the island after migrating from the mainland, the founder population may have undergone significant changes in its gene pool and become a new species.

The likelihood of allopatric speciation increases when a population is small as well as isolated, making it more likely than a large population to have its gene pool changed substantially.

Geographic isolation creates opportunities for new species to develop, but it does not necessarily lead to new species because speciation occurs only when the gene pool undergoes enough changes to establish reproductive barriers between the isolated population and its parent population.

With its gene pool isolated, a separate population can follow its own evolutionary course.

A key event in the origin of many species is the separation of a population with its gene pool (all of the genes in a population at any one time) from other populations of the same species, thereby preventing population interbreeding.

In this way, the resistant gene can make its way into the weed population.

If the crop plants hybridize and reproduce with weedy relatives, then this herbicide-resistant gene will be perpetuated in the offspring.