Man
Man, v. t. to tame a hawk; to direct, to aim
Sex chromosome | Definition, Examples, & Facts | Britannica
Sex chromosome, either of a pair of chromosomes that determine whether an individual is male or female.
The sex chromosomes of human beings and other mammals are designated by scientists as X and Y.
In humans the sex chromosomes consist of one pair of the total of 23 pairs of chromosomes.
The other 22 pairs of chromosomes are called autosomes.
Individuals having two X chromosomes (XX) are female; individuals having one X chromosome and one Y chromosome (XY) are male. The X chromosome resembles a large autosomal chromosome with a long and a short arm. The Y chromosome has one long arm and a very short second arm. This path to maleness or femaleness originates at the moment of meiosis, when a cell divides to produce gametes, or sex cells having half the normal number of chromosomes.
During meiosis the male XY sex-chromosome pair separates and passes on an X or a Y to separate gametes; the result is that one-half of the gametes (sperm) that are formed contains the X chromosome and the other half contains the Y chromosome. The female has two X chromosomes, and all female egg cells normally carry a single X. The eggs fertilized by X-bearing sperm become females (XX), whereas those fertilized by Y-bearing sperm become males (XY).
A man is an adult male human.[1][2]
Prior to adulthood, a male human is referred to as a boy (a male child or adolescent).
Like most other male mammals, a man's genome usually inherits an X chromosome from the mother and a Y chromosome from the father.
Sex differentiation of the male fetus is governed by the SRY gene on the Y chromosome.
During puberty, hormones which stimulate androgen production result in the development of secondary sexual characteristics, thus exhibiting greater differences between the sexes.
These include greater muscle mass, the growth of facial hair and a lower body fat composition.
Male anatomy is distinguished from female anatomy by the male reproductive system, which includes the penis, testicles, sperm duct, prostate gland and the epididymis, and by secondary sex characteristics, including a narrower pelvis, narrower hips, and smaller breasts.
Throughout human history, traditional gender roles have often defined and limited men's activities and opportunities.
Men often face conscription into military service or are directed into professions with high mortality rates.
Many religious doctrines stipulate certain rules for men, such as religious circumcision.
Men are over-represented as both perpetrators and victims of violence.