Triple-X Females A female usually has only 2 X-chromosomes in each cell. In approximately 1 per 1,000 female births, a child is born with 3 X-chromosomes in each cell. Most often this condition isn’t diagnosed until later in life. People normally have 46 chromosomes in each cell. Two of the 46 chromosomes are sex chromosomes, ...
Evolution is influenced by many factors, but genetic mutations are by far the most important. Mutations can produce any new trait – the possibilities are limitless. Genetic mutations are one of the most integral biological processes in the science – especially in consideration of evolution. Mutations are the only force of evolution that can produce ...
I am a mother of four lovely girls. My younger sister (who came next to me) has two burly boys. The rest of our siblings have at least one boy and one girl in their respective broods. During family gatherings, my sister and I never get tired of kidding our respective youngest kids by saying ...
Molar pregnancies are not common. One of every 1000 pregnancies are molar pregnancies. A molar pregnancy means there is no fetus (in most cases). The problem begins with the egg rather than the sperm. Even in cases where the sperm grows normally (partial molar pregnancy) the fetus does not survive. The egg is defective and ...
Human beings are made up of cells that contain 23 sets, or pairs of chromosomes. Half of those chromosomes come from the mother and half from the father. On occasion, something happens within the cells to cause an abnormality in the number of chromosomes present; sometimes, there are too few chromosomes and other times, there ...
Male calico cats are, biologically speaking, impossible. However, when a combination of very uncommon factors align, a calico cat might appear to be male, both anatomically and behaviorally. Because these specimins are so exceedingly rare, there are many internet-fueled rumors suggesting that male calicos are worth very large amounts of money. Unfortunately for their owners, ...
It’s a very rare cat indeed. It looks exotic enough to have just slithered out of the jungle. This hybrid cat is so rare, there are very few photos of the breed. According to Pictures of Cats, there are only about 70 Safari cats registered with the International Cat Association. Its head is shaped like ...
Trisomy is a genetic disorder in which a child is born with all or part of an extra chromosome. Normally humans have two copies of every chromosome (except for males who have a pair of different chromosomes in the form of the sex chromosomes the X and the Y). In Trisomy, a child is born ...
Hybrids are often created by putting two similar related species in the same pen and letting “nature” take is course. However, when the size difference of the two species makes breeding physically impossible this isn’t an option. This is the case with the camel and the llama. How did we get a cama then? A ...
Down’s syndrome is a genetic condition that happens because of the presence of an extra chromosome. It was first described in 1886 and is not classed as a disease as children do not suffer from Down’s syndrome. Although children with Down’s syndrome will have specific physical characteristics there are more differences than similarities amongst children ...
