Inheritance of Sex Linked Genes

-

As we read under the heading of linkage, there are certain genes or gene groups, which are attached to the chromosomes and are inherited along with the chromosomes in the next generation. Will know the Lakhans related to.

The foundation of human genetics was laid by Sir Francis Galton in 1883, due to which Sir Francis Galton is called 'The Father of Human Genetics'. Under human genetics, the traits that are inherited in humans are studied.

Sex Linked Genes

Agriculture Committee

Sex Linked Inheritance

A total of 46 chromosomes are found in human vegetative cells, out of which 22 pairs of chromosomes are related to vegetative cells while one pair of chromosomes are related to gender XY (X – for female and Y – for male), that is, determine the sex in humans. These somatic genes are attached or linked to the sex chromosomes and are passed on from one generation to another. In this way, they continue to display the hereditary somatic character in the next generation. These genes are called Sex Linked Gene while the character controlled by these genes are called Sex Linked Characters. And the inheritance of these traits is called Sex Linked Inheritance. So far about 120 sex linked traits have been discovered in humans.

Types of Sex Linked Traits

Sex-linked traits found in humans can be divided into the following three parts on the basis of their presence on the sex chromosome –
  1. Holandric Sex Linked Characters   Or    Y  -  Linked Traits
  2. Diandric Sex Linked Characters     Or    X  -  Linked Traits
  3. Incomplete Sex Linked Characters

1. Holandric Sex Linked Characters     Or     Y Linked Traits

The genes for these traits are located on the heterozygous part of the Y-chromosome and their alternative or alleles are not found on the X chromosome. Such symptoms reach directly from father to son. These symptoms are not present in women. Due to being located on the Y-chromosome, they are called Y-linked traits. Hypertrichulosis of Karnapallav i.e. hair growing on the ears of men is a prime example of this.

2. Diandric Sex Linked Characters     Or    X  -  Linked Traits

The genes for these traits are located on the heterozygous part of the X-chromosome and their alternative or alleles are not found on the Y-chromosome. Such traits reach from father to daughter and from daughter to son, hence this type of inheritance is called Criss-Cross Inheritance. Being located on the X-chromosome, they are called X-Linked Traits. Color blindness, Haemophilia and Defective Enamel are prime examples of this.

3. Incomplete Sex Linked Characters

The genes for these traits are located on the homologous part of the X or Y chromosome, and they are inherited in the same way as normal somatic traits. Complete color blindness is a prime example of this.

Reasons for Mendel's Success - Genetics

Comments

Post a Comment

Popular posts from this blog

Indian Martial Art - Part 4

-
Image
Indian Martial Art The  literal meaning of 'martial art' is - 'art related to waging war'.  As we all know,  India is a country of traditions and cultures . Indian martial arts or martial arts are also one of the many variations of India. In ancient times, these martial arts played an important role in defeating the opposing side and establishing their supremacy over the dynasties and primitive tribes, but in the present context, if we look at these martial arts, they are  used generally in Physical health benefits, for self-defense, for religious rites and in the film world. These martial arts are mainly related to dance, yoga and performance arts. Different Branches and Sub-Branches of Science and Their Fields of Study Different Types of Indian Martial Arts Different types of martial arts are prevalent in different states and regions of India, some of which we will see in this article. We will see the details of the remaining others in the next article under differ...
Read more

Evolution of the Indian Constitution : Historical Background (Part - 2)

-
Image
Evolution of the Indian Constitution : Historical Background (Part - 2) We will understand the material related to the development of the Indian Constitution in the following four parts, whose links are as follows – Evolution of the Indian Constitution : Historical Background (Part - 1) Evolution of the Indian Constitution : Historical Background (Part - 2) Evolution of the Indian Constitution : Historical Background (Part - 3) Evolution of the Indian Constitution : Historical Background (Part - 4) We can divide the development of the Indian Constitution mainly into two categories – Acts passed under the British East India Company (1773 – 1853) Regulating Act 1773 Act of Settlement 1781 Act of 1786 Pitt's India Act 1784 Charter Act, 1793 Charter Act, 1813 Charter Act, 1833 Charter Act, 1853 Acts passed under the British Crown (1857 – 1947 ) Government of India Act, 1858 Indian Councils Act, 1861 Act of 1873  Imperial Titles Act, 1876 Indian Councils Act, 1892 Indian Councils Act, 1...
Read more

Major Facts Related to Lakes of India And The World

-
Image
Major Facts Related to Lakes The major facts related to lakes are as follows , which can be categeorise into Lakes of the World and The lakes of the India. These are as follows -  Albinism : Genetic Mendelian Abnormality Lakes of the World Deepest lake – Lake Baikal (1750 m.) The lowest depth lake – Lake Chad of Africa (3 m.). Largest lake – Caspian Sea, followed by Lake Tanganyika. Longest lake – Lake Tanganyika (660 km), Fresh water lake. Largest fresh water lake – Lake Superior (US) | Highest navigable lake – Titicaca (located on the border of Peru and Bolivia) Highest lake – Tisso Sikru (located in the plateau of Tibet). Largest caldera lake – Tobajil (Indonesia) | Most salinity lakes – Turkey's Van Lake (330%), Jordan's Dead Sea (238%), America's Great Salt Lake (220%). Edicts and Architecture of Mauryan Lakes of India The lakes located in the deltaic regions of the river Ganges are called Bhils. The lagoon lake located on the west coast of India is called Kayal. Bemba...
Read more