Meiosis is the process by which gametes are formed in both male and female animals. In males, spermatogenesis occurs in the testes and involves one cell undergoing meiosis I and II to produce four haploid sperm cells. In females, oogenesis occurs in the ovaries and involves one cell receiving most of the cytoplasm after meiosis I and undergoing meiosis II to form a large haploid egg, while the other cell becomes a non-viable polar body.

1. Gamete formation in Male and Female animals involves Meiosis Mr. Hunter Biology 11.30.09 Hyde Park Academy

2. Formation of gametes Meiosis is the primary event in the formation of gametes. This is called ______________ The process by which sperm are produced in male animals is called _____________ Spermatogenesis occurs in the testes A diploid cell increases in size and becomes a large immature cell

3. Spermatogenesis The large cell then undergoes ________ I. Two cells are produced, each of which undergoes _________ II. to form a total of four ________ cells. The four cells change in form and develop a tail to become male gametes called ___________.

4. Meiosis and females Oogenesis The process by which _________ are produced in females is called _____________. Oogenesis occurs in the _________. During cytokinesis following meiosis I, the cytoplasm divides unequally.

5. Meiosis and females Oogenesis One of the resulting cells gets nearly all of the cytoplasm. It is this cell that will give rise to an egg cell. The other cell is very small and is called a ________ body. These cells will not survive. The larger cell will undergo ________ II.

6. Meiosis and females Oogenesis The division of the egg cell during cytokinesis is again unequal. The larger cell develops into a gamete called a _________ The smaller cell, the second ________ body dies. Because of its larger share of ________, the ovum is rich in nutrients.

7. REVIEW Meiosis is the primary event in the formation of _____________ The process by which sperm is produced in male animals is called_____________ How many immature sperm cells are produced at the end of meiosis I_______ What is the total number of haploid sperm cells at the end of meiosis II? _________ The process by which gametes are produced in female animals is called _____________ The __________ divides unequally following meiosis I. The cell that has the least cytoplasm is called a _________ The larger cell undergoes meiosis II and develops into a gamete called an _______