Males have two distinct sex chromosomes (XY), and are called the heterogametic
sex. ... This and other factors result in the sex differences in humans. ... XY system
in mammals: Sex is determined by...
Mar 14, 2012 ... What is the big difference about the X and Y chromosomes that make the
difference between male and female people? Do the cells just ...
The biological differences between men and women result from two ... the Y
chromosome resulting in XY gonadal dysgenesis, XX males, or XY females;
May 30, 2014 ... Although the Y chromosome's role in sex determination is clear, research ...
Males have only one X chromosome and therefore only one copy is expressed. ...
In females, these regulatory genes escape X-inactivation so that the copy ... of
differences in biology, health and disease between men and women.
May 11, 2011 ... For chromosome pairs 1-22, the autosomes, there is no difference between
males and females. • Chromosome pair 23 is radically different for ...
Mar 23, 2005 ... Men have one X chromosome and one Y chromosome, the latter being ... the
inactive X chromosome could explain some of the differences between men ... of
the genes are expressed at higher levels in females than in males.
Aug 3, 2012 ... Nadeau reports that the splenium is larger in females than males, and this size
difference creates more brain activity. This in turn allows men ...
The key is the X chromosome, the "female" sex chromosome that all men and ...
Females can differ from each other almost as much as they do from males in the
way ... candidate genes that could explain differences between men and women.
In humans and other mammals, the sex chromosomes are X and Y. Females
have ... The differences in sex chromosomes between males and females leads
What Is the Relationship Between a Chromosome & an Allele? ... The main
difference between male and female chromosomes is that the pair determining ...