When someone has two Y chromosomes they develop a condition called Jacob's syndrome. In most cases, this condition, which affects men, does not significantly alter a man's way of life, although there are some associated ... More » Science Human Anatomy

A human cell containing 22 autosomes and either an X or Y chromosome is a sperm cell. According to Genetics Home Reference, all female egg cells contain an X chromosome along with their 22 autosomes. This arrangement mea... More » Science Biology Molecular Biology & DNA

Human sperm cells, also called spermatozoon, contain 22 autosomes, a single Y chromosome, and a single X chromosome. Female egg cells contain 22 autosomes and two X chromosomes. More » Science Biology Cells
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An acupressure practitioner can send someone to sleep quickly by applying pressure on one or several of his pressure points. For example, applying pressure on the middle of the inner side of the wrist, between the eyebro... More » Science Human Anatomy

To wake someone from a deep sleep, gently walk into her bedroom, move closer to the bed, and uncover her slowly. Call the person with a low voice, and raise your tone as you continue calling while simultaneously shaking ... More » Science Human Anatomy