Question

How does molecular genetics support evolution?

Answer 1

Molecular genetics: Molecular genetics is said to be the study of chromosomes DNA at molecular levels using the DNA technology.

Genetics and evolution:

1. Genetics is one of the key factors of evolution.
2. It is thought that we've descended from a common ancestor which had one set of the genome.
3. Mutations of those genes caused the formation of more modern and exceptional species from that single genome.
4. Genetic versions turn out to be an end result of a mutation in an effort to be scattered and maintained withinside the populations due to key standards – natural selection and genetic drift.

Three factors that govern molecular evolution are:

1. Selection
2. Mutation
3. Recombination – Genetic drift and Gene conversion

Concepts Supporting The Theory Of Evolution

Molecular Evidence:

1. An alteration within the composition of molecules of the cells including RNA, DNA, and proteins over generations is known as molecular evolution.
2. It is primarily based totally on the laws of population genetics and evolutionary biology. So one can illustrate adjustments within the pattern.
3. All species have the 4 carbon-based molecules which are – nucleic acids, amino acids, carbs, lipids, RNA, and DNA molecules.

Natural Selection:

1. It is one of the principal standards that brings evolution.
2. It is a process wherein entities better survived in their surroundings, and tend to survive in spite of the environmental pressures.
3. These entities will mate to breed consequently passing on their genes which gradually become the most common characteristic exhibited within the generations.

Sexual Selection:

1. It is a natural selection process that arises through the desire for certain traits of an individual.
2. These species search for their mates with a particular trait which typically indicates the presence of good genetics.

Artificial Selection:

1. Manual choice of preferred traits in a selected animal takes place.
2. These animals with the selected traits exhibited are made to reproduce with animals having a different genotype altogether, so we can produce a completely unique species.

Anatomical Compositions:

1. Many animals have similar body traits that are useful in performing functions.
2. These structures are called homologous. Analogous structures are different structures that show similar functions.
3. This is dependent on the environment.