Download cell division - 7 - Mugans Biology Page

NAME___________________________
DATE___________________
HOUR___________________
BIOLOGY I
MEIOSIS AND GAMETOGENESIS
CELL DIVISION - 7
DIRECTIONS: The drawings below represent a cell going through meiosis. This cell has three pairs of
homologous chromosomes. Use the shape and shade of each chromosome to follow where the chromosomes
go as these cells divide.
QUESTIONS
1. What is the purpose of Meiosis?
2. Why is Meiosis necessary for sexual reproduction?
3. What are tetrads? When do they form?
4. What is crossing over? When does it happen?
SPERMATOGENESIS DIRECTIONS: In the drawings below label the primary spematocyte, secondary
spermatocyte, spermatid, and mature sperm cell. This cell has two pairs of homologous chromosomes. Use
the shape and shade of each chromosome to follow where the chromosomes go as these cells divide.
OOGENESIS DIRECTIONS: In the drawings below label the primary oocyte, secondary oocyte, polar
bodies, and the mature ovum. This cell has two pairs of homologous chromosomes. Use the shape and shade
of each chromosome to follow where the chromosomes go as these cells divide.
QUESTIONS:
1. How many egg cells does Oogenesis
produce?
2. What causes the differences in size
between the polar bodies and the other
oocytes?