Overview. Iron-deficiency anemia is a common type of anemia. The term anemia usually refers to a condition in which your blood has a lower than normal number of red blood cells. Red blood cells carry oxygen and remove carbon dioxide (a waste product) from your body.
The Y chromosome is one of two sex chromosomes (allosomes) in mammals, including humans, and many other animals. The other is the X chromosome. Y is the sex-determining chromosome in many species, since it is the presence or absence of Y that determines the male or female sex of offspring produced in sexual reproduction. In mammals, the Y chromosome contains the gene SRY, which triggers testis development.
Yay. The word yay is usually used as an interjection and exclamation to show joy. A person might say something like, Yay! My new kitten finally arrived! The word is likely derived from yea, meaning simply yes, but shifted spelling over time, perhaps to indicate excitement. Yay has the same pronunciation as yea and rhymes with hay.