The theory of evolution is a big lie.

Modern science has no examples of improving of the genetic code for this reason, it is impossible to call the theory of evolution proven, but rather it can be called anti-scientific.

The point is that God created living creatures by families or as translated in the Bible after its kind.

Genesis 1:21 And God created great whales, and every living creature that moveth, which the waters brought forth abundantly, after their kind, and every winged fowl after his kind: and God saw that it was good.
22 And God blessed them, saying, Be fruitful, and multiply, and fill the waters in the seas, and let fowl multiply in the earth.
23 And the evening and the morning were the fifth day.
24 And God said, Let the earth bring forth the living creature after his kind, cattle, and creeping thing, and beast of the earth after his kind: and it was so.
25 And God made the beast of the earth after his kind, and cattle after their kind, and every thing that creepeth upon the earth after his kind: and God saw that it was good.

God created all living beings in families (kinds) and from the beginning laid for each family all the gene base information within which the species can undergo transformation.

So the basic genetic information within which the species can undergo transformation was loaded by God from the beginning in the first individuals of representatives of each family and when the multiplication process was launched this information began to manifest itself in descendants in various combinations. Evolution does not exist and there is only a process of disclosing the information that was originally available. God originally planned to provide diversity within each family of living beings and He in His wisdom provided the ability of each family to adapt to changing external habitat conditions because He knew that the external environment would change and the animals would have to adapt to different living conditions.

Basic information is like a Rubik's cube and in each new generation gives out a new combination, but it does not cease to be a Rubik's cube and it does not exceed the limits of the family. The cube does not become a cylinder or a cone, but it always remains a cube, and the family is stable and transitional forms between families do not exist.

Take for example a human being, the appearance of a person is diverse and humanity is divided into races, nationalities, etc. But the fact is that all the information within which the appearance of a person can undergo changes was originally laid by the Creator in Adam and even Eve was originally in Adam and God, as it is written in the Holy Scripture, taken from him. All the mankind already existed in Adam when he was created by God and all races, all nationalities were also created in him, so there was laid the entire diversity of the human species and the ability of the human species to adapt to external habitat conditions, for example, the ability of the skin to change color depending on the habitat.

The work of selectionists shows how the hidden information that was originally laid can be discovered both in animals and in plants.

There is a huge number of breeds of dogs in the world, but all this diversity was originally laid by God in the progenitor of this family i.e. in the first individuals and began to open in the process of reproduction and with the participation of selectionists.

When God decided to judge the world through a flood of water, He told Noah to take a pair of each creature inside, i.e. God knew that every representative of this species has basic information about each family (kind) and it is enough to have two different-sex individuals of family members in order to regenerate the diversity of the family.

Genesis 6:19 And of every living thing of all flesh, two of every sort shalt thou bring into the ark, to keep them alive with thee; they shall be male and female.
20 Of fowls after their kind, and of cattle after their kind, of every creeping thing of the earth after his kind, two of every sort shall come unto thee, to keep them alive.

God while creating “uploaded” the software for each family and this program does not produce chimeras but stably keeps the family within certain limits. For example, if it was not originally laid that the color of the dog could be bright green, then such an individual would never appear.

So-called mutations or errors when copying basic information do not lead to improvement of the genetic code and information multiplication, but in more than 90% of cases they are harmful and only a miniscule share of them is considered useful, and the relatively and only from the human perspective, like the six legs of the calf do not always go right.