Genetics and Evolution

An individual polygenic is one of a group of non-epistatic genes that interact additively to influence a particular trait, thereby contributing to multiple-gene inheritance (also known as polygenic inheritance, multigenic inheritance, or quantitative inheritance), a type of non-Mendelian inheritance that differs from the single-gene inheritance, which is the fundamental concept of Mendelian inheritance. Because it […]

Introduction Many traits and constitution characters present in plants and animals like height, skin pigmentation, hair and eye colour, milk and egg production are familial through several alleles gift in numerous loci. This is often referred to as heritable inheritance. If we tend to associate examples of height or skin pigmentation in humans, we discover

What is Pleiotropy? Pleiotropy, in genetics, is the expression of multiple traits using a single gene. Pleiotropy comes from a Greek word that means more. One simple example of Pleiotropy would be phenylketonuria, a form of disease. It is a genetic disorder that results in a low metabolism of the amino acids phenylalanine within the body

Introduction “Pleiotropy” comes from a Greek word that means “more  ways.” Gregor Johann Mendel, the father of genetics, made many intriguing discoveries about the colour of various plant components. According to Mendel, the plants with coloured seed coats also have coloured leaf axis. He also noticed that the pea plants had white-coloured blooms and colourless

Although the phrases genotype and phenotype may sound similar, there is a significant distinction between the two. The genotype is a group of genes in DNA that are responsible for a specific trait or feature, whereas the phenotype is an organism’s outward appearance or characteristic. Genotypes :  A gene is a segment of DNA that

Introduction Linkage is the close connection of genes or other DNA classifications on a similar chromosome. The nearer the two inheritable factors are to each other on the chromosome, the superior is the chance that they will be inbred together. Genetic linkage is the most significant exception to the Law of Independent Assortment by Gregor

Introduction In eukaryotic organisms, linkage and crossing over are two related but distinct events. The tendency of genes to stay together on a chromosome is known as genetic linkage while crossing over is a phenomenon in which genetic information is exchanged in the germline. Both these factors have a significant impact on heredity. And both

Pedigree analysis is a family tree chart that shows which members of the family are influenced by a genetic trait. The goal of a pedigree is to facilitate an easy chart that displays a certain trait or disorder in a person. Pedigree Chart A pedigree chart comprising all of a family’s members can be used

Introduction Down’s Syndrome is another type of genetic disorder that is caused due to the existence of an extra chromosome. It is also known as the name of Trisomy of chromosome 21. It is the most popular and common genetic disorder all around the world. More than 90% of genetic disorders worldwide are Down’s Syndrome.

Every individual is distinct because they possess a distinct set of characteristics. The characteristics that are passed down from one generation to the next during the process of fertilisation are referred to as hereditary characteristics. The rules of heredity have a role in determining how this heritage is passed along. Inherited characteristics are encoded in