Chromosomal theory of inheritance, linkage, sex determination

Y linked inheritance is known as the inheritance of genes on the Y chromosome. As only males mainly have a Y chromosome, Y-linked genes can only be transmitted from father to son. Y-linked inheritance is also known as the holandric inheritance. Humans and other different mammalian males have the sex chromosomes such as the X […]

The ways by which a genetic trait or condition is caused via a mutated (i.e. changed) gene present on the X chromosome can be passed down (i.e. inherited) from parent to child. In X-linked recessive inheritance, a daughter can inherit a single mutated gene on the X chromosome from one of her parents. The X

Introduction X-linked dominant inheritance describes a genetic condition that is associated with mutations in genes that are located on the X chromosome. For disease to cause in both males  (who possess only one X chromosome) and females (who have two X chromosomes) only a single copy of the mutation is enough. In some cases, the

X-linked genes are those that are located on the X chromosome. Therefore, the X chromosome is one of two sex chromosomes found in humans. Males have an X and a Y chromosome, while females have two X chromosomes. When males are mutated, the majority of genes on the X chromosome exhibit a phenotype. That is

There are several methods for examining DNA to determine if two samples are the same or different from one another. DNA fingerprinting is a term that is sometimes used to describe this process. A cloned bit of DNA can be analysed in the laboratory to see if it has any sections in common with another

Acromegaly is a disorder in which your body creates excessive amounts of growth hormone (GH). GH is a factor in regulating physical growth in the body and is mostly created by the pituitary gland. This hormone causes bones, cartilage, tissues, and internal organs to expand in size when it is overproduced in adulthood. Enlarged or

Introduction Syndrome is a set of medical symptoms and signs that are correlated with each other and often caused by a particular disorder or disease. It is a concern for all as they get undiagnosed by most of the time. In this article, we will focus on the Turner’s and Klinefelter’s syndromes which is due

Genetics is a very important part of biology. It helps us trace our origins and determine why we are the way we are. It also enables us to understand our ancestry and how we evolved. That’s why it’s important to study genetics as it’s an essential topic in competitive exams. Many researchers have discovered their

A test cross is the mating of an organism whose genetic makeup is unknown with an organism whose entire genetic makeup for a trait is known to determine which genes are carried by the former. A dog with a black-coloured coat may be pure breeding, with two genes for black coat colour, or hybrid, with

The majority of dwarfisms are generated by a genetic change (mutation) in an egg or sperm cell that occurs before conception (conception). Others occur as a result of genetic changes passed down from one or both parents. Genetic alterations occur at random. There is nothing a parent can do to prevent this alteration from occurring