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The Y Chromosome Determines Maleness

The Y Chromosome Determines Maleness

The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size. Today,...

X and Y Chromosomes

X and Y Chromosomes

Among mammals, the gender of an organism is determined by the sex chromosomes. Humans have two sex chromosomes, X and Y. Every human diploid cell has 22 pairs of autosomes and one pair of sex chromosomes. A human female has two X chromosomes, while a male has one X chromosome and one Y chromosome.
The germline cells such as egg and sperm cells carry only half the number of chromosomes, i.e., 22 autosomes and one sex chromosome. All eggs have an X chromosome, while sperm cells can carry an X or...

Pedigree Analysis

Pedigree Analysis

Karyotyping

Karyotyping

Describing the number and physical features of chromosomes can reveal abnormalities that underlie genetic diseases. This description is facilitated by special staining techniques that produce a particular banding pattern on each chromosome. State-of-the-art techniques make this approach even more powerful, enabling the detection of individual genes that cause disease.A Simple Chromosome Staining Technique Provides Valuable Scientific InsightSome genetic diseases can be detected by looking at...

Polytene Chromosomes

Polytene Chromosomes

Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also regularly...

The Ratio of X Chromosome to Autosomes

The Ratio of X Chromosome to Autosomes

In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...

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Related Experiment Video

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Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information

Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information

Published on: August 15, 2019

A database for human Y chromosome protein data.

Karthikeyan Pallipalayam Periyasamy¹, Palaniswamy Thanga Velan Lakshmi, Chinmay Kumar Dwibedi

¹Phytomatics Laboratory, Bioinformatics Division, Bharathiar University, Coimbatore, India. ppkarthikeyan@gmail.com

|May 13, 2010

Summary

Researchers analyzed 107 uncharacterized proteins from the human Y chromosome, which determines sex. This study provides physicochemical properties and predicted structural data to understand their molecular functions, creating a freely available database.

Keywords:

Y chromosome protein function homology modelling human sequence

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Area of Science:

Genomics
Proteomics
Human Genetics

Background:

The human Y chromosome plays a crucial role in sex determination.
107 of the 196 Y-chromosome-associated proteins remain uncharacterized.
Understanding these proteins is vital for comprehending Y chromosome function.

Purpose of the Study:

To characterize the 107 uncharacterized proteins of the human Y chromosome.
To elucidate the molecular functions of these proteins using computational analysis.
To create a publicly accessible database for Y chromosome protein research.

Main Methods:

Physicochemical property computation using sequence data.
Analysis of predicted structural data for protein function.
Database compilation and curation of derived data.

Main Results:

Derived physicochemical properties for 107 Y chromosome proteins.
Predicted structural insights into protein functions.
A comprehensive database of Y chromosome protein information.

Conclusions:

The study provides valuable data for understanding uncharacterized Y chromosome proteins.
The freely available database facilitates further research and refinement.
This work contributes to the broader understanding of human sex determination and genetics.