Types of Sex Ratio
The sex ratio varies according to the age profile of the population. It is generally divided into four:
- primary sex ratio — ratio at fertilization
- secondary sex ratio — ratio at birth
- tertiary sex ratio — ratio in sexually active organisms
- quaternary sex ratio — ratio in post-reproductive organisms
Measuring these is a problem since there are no clear boundaries between them.
Read more about this topic: Sex Ratio
Famous quotes containing the words types of, types and/or ratio:
“The wider the range of possibilities we offer children, the more intense will be their motivations and the richer their experiences. We must widen the range of topics and goals, the types of situations we offer and their degree of structure, the kinds and combinations of resources and materials, and the possible interactions with things, peers, and adults.”
—Loris Malaguzzi (1920–1994)
“Our major universities are now stuck with an army of pedestrian, toadying careerists, Fifties types who wave around Sixties banners to conceal their record of ruthless, beaverlike tunneling to the top.”
—Camille Paglia (b. 1947)
“People are lucky and unlucky not according to what they get absolutely, but according to the ratio between what they get and what they have been led to expect.”
—Samuel Butler (1835–1902)