Chromosomal theory of inheritance, linkage, sex determination

The word species comes from the Latin word species, which means “kind” or “appearance.” A species is a collection of organisms capable of reproducing and producing viable progeny. Members of a species might also have a striking resemblance in appearance. Members of a species are nearly similar in anatomy, physiology and behavior, except for minor […]

Complex diseases are the result of a complex interaction of genes and environmental influences, most of which are unknown. Although certain complicated diseases are highly heritable, most do not follow precise, well-defined inheritance models and are rarely caused by a single defective gene. Complex Diseases A mix of hereditary and environmental variables causes complex disorders.

A complementary gene is one of two or more genes that, when present together, create qualitatively diverse effects from each of their individual effects. The complementary gene is the result of the interaction of two dominant non-interallelic genes, each of which has its own effect, but when they interact, a new trait emerges, and the

Introduction   A link between two variants of a gene is considered as codominance. Each parent contributes to each child one allele, which is a variant of a gene. If the alleles are different, the dominant allele will normally be manifested, while the weak allele’s effect will be muted. However, neither allele is recessive in codominance, and

Introduction In this article, we will introduce the topic of co-dominance. We have introduced the concept of co-dominance from Biology. In co-dominance, both the gene expressed for a particular character in F1 hybrid progeny. There is no blending of characters, whereas both the characters are expressed equally. Let’s start with the types of dominance. Co-Dominance 

In most cases, each gene has two distinct alleles. The dominant allele is dominant, while the recessive allele is recessive. In the heterozygous state, the dominant allele expresses its phenotypic while repressing the recessive allele, according to Mendelian inheritance.  Some genes, on the other hand, have 3 or more alleles for a single feature. Multiple

Introduction Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure. Each chromosome contains hundreds to thousands of genes, which carry the instructions for making proteins. Genes, made up of a tiny stretch of DNA, are the basic functional unit of heredity. Chromosomes are DNA and

Introduction Chromosomes are a thread-like structure made up of nucleic acids and proteins found within the nucleus of live cells. They are primarily responsible for conveying genetic information in the form of genes. In the early 1900s, Boveri and Sutton postulated the chromosomal hypothesis of heredity. In genetics, it is the most fundamental idea. According

Genes are passed from parents to the child and are the building blocks of heredity. They hold DNA, which carries instructions for making proteins that do most of the work in the cells. Chromosomes contain thousands of genes that make proteins that direct a body’s development, growth, and chemical reactions. In the case there is

Dwarfism is a condition characterised by short stature that can be caused by a genetic or medical condition. In most cases, dwarfism is defined as having an adult height of no more than 4 feet 10 inches (147 centimetres). The average adult height among people who have dwarfism is 4 feet 6 inches tall (122