The second portion of the chapter deals with muscular fatigue, including the most likely causes of fatigue to various categories of activity, and muscle soreness. Methods of assessing muscular strength are presented in the third section of the chapter.
The sex chromosomes are the X chromosome and the Y chromosome. Sex Chromosomes. In human sexual reproduction, two distinct gametes fuse to form a zygote. Gametes are reproductive cells produced by a type of cell division called meiosis. Gametes are also called sex cells. They contain only one set of chromosomes and are said to be haploid. The male gamete, called the spermatozoan, is relatively motile and usually has a flagellum. The female gamete, called the ovum, is nonmotile and relatively large in comparison to the male gamete.
Body cells have pairs of chromosomes while sex cells have only single sets of chromosomes. The human body cells have 22 pairs of autosomes and 1 pair of sex chromosomes for â¦ a total of 23 pairs or 46 chromosomes.Sex cells for humans will have half of that (because they are not paired) so a total of 23 chromosomes.6. The cells of the human body, for example in the liver, brain, and muscles, contain two sets of chromosomes, and are called diploid. There are 23 chromosomes in each set, â¦ and we inherit 23 from each parent. 2 people found this useful.