The human sex chromosomes are of the XX-XY pattern. The Y chromosome is much smaller than the X chromosome. Two types of sperm cells are formed during
gametogenesis; half of these have the X chromosome and the others have the Y
chromosome. Every egg cell has an X chromosome; therefore, fertilization determines the
sex. If a Y sperm cell fertilizes the egg a male develops.
2. The author's purpose is to
a. explain how the sex of humans is determined.
b. describe chromosomes.
c. tell the steps in fertilization.
d. contrast X and Y chromosomes

Read this adapted excerpt from a famous poem by john keats. this poem is about a beautiful vase with intricate shapes and patterns. you, silent form, do tease us out of thought as does etemity: cold pastorall when old age shall this generation waste, you shall remain in the middle of other woe than ours, a friend to man, to whom you say "beauty is truth, truth beauty that is all you know on earth, and all you need to know what is the poet saying when he writes that "old age shall this generation waste"? the poet is expressing his dread of growing older the poet is mourning the changes he sees in his "generation." the poet is saying that beauty is illusionary and short-lived. the poet is saying that people don't live long; life is brief