• Thursday July 9,2020

Chromosmic Theory of Inheritance

We explain to you what the chromosome theory of inheritance formulated by Sutton and Boveri is. In addition, how it is based on Mendel's laws.

The chromosomal theory of inheritance postulates that the genes are in the chromosomes.
  1. What is the chromosome theory of inheritance?

The chromatic theory of inheritance or chromatic theory of Sutton and Boveri is the scientific explanation of the transmission of certain characters through the genetic code that contains the living cell, which occurs between one generation of individuals and the next.

This theory was developed by scientists Theodor Boveri and Walter Sutton in 1902 . Despite the distance between them, Boveri (German, 1862-1915) and Sutton (American, 1877-1916) postulated the same conclusions independently from previously existing knowledge about inheritance and cellular functioning.

It was a debated and controversial theory until 1915, when experiments with Drosophila melanogaster flies by American scientist Thomas Hunt Morgan (1856-1945) confirmed them completely.

The chromosomal theory of inheritance studied the genes, that is, the segments of DNA that encode specific proteins, also called hereditary factors. his studies on the inheritance Gregor Mendel (1822-1884). Specifically, he postulated that the genes are located within the chromosomes of the cell, located in turn within the cell nucleus.

The existence of chromosomes was already known and their replication was known during cell division, but from now on they were much better known: it was learned that they come in homologous pairs, one from the mother and one from the father, so the reproductive cells or gametes must provide each individual with the exact half of the genetic material.

This theory allowed us to understand why certain characters are inherited and others are not, that is, why one allele is transmitted and another is not, since they are independent of each other, when they are located on different chromosomes. For example, the chromosome that contains information about the sex of the individual is different from the chromosome that contains information about the color of their eyes, etc.

It can serve you: Mutation

  1. Mendel's Laws

Mendel discovered that not all genetic information is manifested.

The main antecedent of the chromosomal theory of inheritance is the studies of Gregor Mendel, who carried out a series of experiments and follow-ups between pea plants, managing to formulate the well-known Mendel Laws on inheritance in 1865.

His experiences were essential to understand how genetic characters are transmitted from one generation to the next. First, he discovered that there are characters (genes) of two types: dominant (AA) or recessive (aa), as manifested in the individual or not, being in the latter case a carrier of the non-manifest gene.

Thus, Mendel proposed the existence of "pure" (homozygous) individuals, whether dominant or recessive (AA or aa), and other heterozygous resulting from genetic mixing and transmission (Aa), for each specific hereditary character.

This approach was the first human attempt to describe the laws that govern genetics, and although its results were recognized much later, it is a revolutionary contribution to its time, the foundation of everything that would come later.

Follow with: Genetics


Interesting Articles

Qualitative and Quantitative Research

Qualitative and Quantitative Research

We explain what qualitative research is and what quantitative research is, its main differences and characteristics. All sciences require some type of research, whether qualitative or quantitative. Qualitative and quantitative research An investigation is an exploration of the information available on a subject , in order to obtain some type of conclusions once the information is obtained and analyzed

Chemical Compound

Chemical Compound

We explain to you what a chemical compound is, what types exist and the chemical composition of water. In addition, the chemical elements. The chemical compounds are the combination of two or more elements. What is a chemical compound? A chemical compound is any substance formed by the union of two or other types of chemical elements , that is, by atoms of two or other different types, linked together

Volleyball

Volleyball

We explain what volleyball is and the main features of this game. In addition, what are the referees and helpers that interfere. The beach and beach beach is a variant that is played on sand. What is volleyball? The volleyball or also called volleyball is a sport that consists of two teams, composed of six players each , facing each other, within a court divided by a net in equal parts

Tropical forest

Tropical forest

We explain what the tropical forest is, its flora, fauna, relief, climate and other characteristics. In addition, tropical forests in Mexico. Tropical forests have enormous biodiversity. What is the tropical forest? Tropical forests are those plant accumulations that are located in the intertropical zone

Microscope

Microscope

We explain what a microscope is, when and who invented this instrument. The parts that compose it and types of microscope. The microscope makes possible the analysis of the particles. What is a microscope? The microscope is an instrument that allows you to observe objects that are too small to be seen by the sight of the human being

Population

Population

We explain to you what is population, what are the different meanings of this term and the studies that are carried out in this regard. For sociology, the population is a set of people or things that can be analyzed. What is Population? The concept of population has its origin in the Latin term ' populat o' , and refers to a formed group of people living in a certain place or region