sex chromosome | Definition, Examples, & Facts ...
Sex chromosome, either of a pair of chromosomes that determine whether an individual is male or female.The sex chromosomes of human beings and other mammals are designated by scientists as X and Y.In humans the sex chromosomes comprise one pair of the total of 23 pairs of chromosomes. The other 22 pairs of chromosomes are called autosomes.
Sex Chromosome Abnormalities - anthro.palomar.edu
Sex Chromosome Abnormalities. The majority of known types of chromosomal abnormalities involve sex chromosomes.In frequency of occurrence, they are only slightly less common than autosomal abnormalities. However, they are usually much less severe in their effects.
INTRODUCTION. Sex chromosome abnormalities are due to numeric abnormalities (eg, aneuploidies such as monosomy X) or structural defects (eg, isochromosome Xq leading to Turner syndrome) involving the X and Y chromosomes.
Sex Chromosome - Merriam-Webster
: a chromosome that is inherited differently in the two sexes, that is concerned directly with the inheritance of sex, and that is the seat of factors governing the inheritance of various sex-linked and sex-limited characters — compare x chromosome, y chromosome
What is sex-chromosome mosaicism? - Accord Alliance
Most people have 46 chromosomes in each of their cells, and two of those 46 chromosomes are sex chromosomes. Most girls and women have two X sex chromosomes (so we say their chromosomal component is “46,XX”).
ZW sex-determination system - Wikipedia
The ZW sex-determination system is a chromosomal system that determines the sex of offspring in birds, some fish and crustaceans such as the giant river prawn, some insects (including butterflies and moths), and some reptiles, including Komodo dragons.The letters Z and W are used to distinguish this system from the XY sex-determination system.. In contrast to the XY sex-determination system ...
Sex chromosome - Wikipedia
An allosome (also referred to as a sex chromosome, heterotypical chromosome, heterochromosome, or idiochromosome) is a chromosome that differs from an ordinary autosome in form, size, and behavior. The human sex chromosomes, a typical pair of mammal allosomes, determine the sex of an individual created in sexual reproduction.Autosomes differ from allosomes because autosomes appear in pairs ...
Klinefelter Syndrome Support Group website
DISCLAIMER The information, text, graphics, and links provided on this site are provided for those seeking information about Klinefelter Syndrome/XXY.
WHO | Gender and Genetics
Sex Chromosome Abnormalities. Chromosomes are the structures that carry genes which in turn transmit hereditary characteristics from parents to offspring.
Linkage group | genetics | Britannica.com
Linkage group: Linkage group, in genetics, all of the genes on a single chromosome. They are inherited as a group; that is, during cell division they act and move as a unit rather than independently. The existence of linkage groups is the reason some traits do not comply with Mendel’s law of independent