BIOLOGY SSS 3 FIRST TERM

WEEK TWO

REPRODUCTIVE SYSTEM IN HUMANS - FERTILIZATION

PERFORMANCE OBJECTIVE

Students should be able to;

1. Explain fertilization
2. Discuss the development of embryo and gamete fusion

1. CONTENT

Fertilization

Fertilization, union of a sperm nucleus, of paternal origin, with an egg nucleus, of maternal origin, to form the primary nucleus of an embryo. In all organisms, the essence of fertilization is, in fact, the fusion of the hereditary material of two different sex cells, or gametes, each of which carries half the number of chromosomes typical of the species. The most primitive form of fertilization, found in microorganisms and protozoans, consists of an exchange of genetic material between two cells.

The first significant event in fertilization is the fusion of the membranes of the two gametes, resulting in the formation of a channel that allows the passage of material from.... View More