FRHD 2270 Chapter Notes - Chapter 2: In Vitro Fertilisation, Y Chromosome, Allosome
30 Nov 2016
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Most cells of the body have a full set of 46 chromosomes-tiny structures in the nucleus that contain genetic material. The gametes each have half that number-23 chromosomes. In vitro fertilization: involves mixing sperm and eggs together in a laboratory dish and then placing a few fertilized eggs in the mothers uterus. Autosomes: the first 22 chromosomes, the chromosome in each pair are about the same size. Sex chromosomes: the 23rd pair of chromosomes determines the sex of the child, with the x larger than the y. And egg always contains an 23rd x chromosome, and the sperm either carries and x or a y. When an x carrying sperm fertilizes the egg, the. 23rd pair is xx, and the egg results in a girl. When an y carrying sperm fertilizes an egg, the 23rd pair is xy, and the egg results in a boy. Each chromosome consists of one molecule- deoxyribonucleic acid-or dna.
