BIOLOGY 310
KEY
Meiosis Practice
LEARNING TARGETS
Describe the events that take place during each stage of meiosis.
Discuss similarities and differences between mitosis and meiosis.
1. What is the total number of chromosomes in human cells before mitosis?
46
2. What is the total number of chromosomes in human cells after mitosis?
46
3. What is the total number of chromosomes in human cells before meiosis?
46
4. What is the total number of chromosomes in human cells after meiosis?
23
5. How many cells are made from a single cell during meiosis?
4
a. How many of these cells survive in males?
4
b. How many of these cells survive in females?
1
6. Which type of cells go through meiosis?
7. How many chromosomes are present in each of the following human cells?
a. stomach cells
b. egg cells
c. liver cells
d. sperm cells
e. heart muscle cells
46 (DIPLOID)
23 (HAPLOID)
46 (DIPLOID)
23 (HAPLOID)
46 (DIPLOID)
8. How are each of the following cells made, through mitosis or meiosis?
a. stomach cells
b. egg cells
c. liver cells
d. sperm cells
e. heart muscle cells
MITOSIS
MEIOSIS
MITOSIS
MEIOSIS
MITOSIS
SEX CELLS
BIOLOGY 310
For each statement, put and “X” in the appropriate box(es) if the statement is true.
Statement
Two new cells are made from each original cell.
Mitosis
X
Meiosis
Four new cells are made from each original cell.
X
DNA replication occurs before division begins.
X
X
Doubled chromosomes pair to form tetrads.
X
Cells with the same chromosomes number as the original are made.
X
Cells with a smaller chromosome number (1/2) than the original are made.
X
Makes egg or sperm cells.
X
Makes body cells.
X
Compare mitosis and meiosis in a variety of organisms. Finish the table below with the number of cells
after each process.
Alligator
Number of
Chromosomes
32
Number of Chromosomes
AFTER MITOSIS
32
Number of Chromosomes
AFTER MEIOSIS
16
Dog
78
78
39
Shrimp
254
254
127
Lettuce
18
18
9
Kangaroo
12
12
6
Rice
24
24
12
Elephant
56
56
28
Potato
48
48
24
Algae
148
148
74
Animal or Plant
Compare meiosis in males and females in humans. Finish the table below with the correct word(s).
Statement
Organ where meiosis occurs.
Males
TESTES
Females
OVARIES
Total number of cells made after meiosis.
4
4
Number of cells that survive.
4
1
Size of cells made and how many of each.
SMALL (4)
LARGE (1) & SMALL (3)
Number of chromosomes in a mother cell.
46
46
Number of chromosomes in a daughter cell.
23
23
PUBERTY
BEFORE BIRTH
DAILY
MONTHLY
When production of sex cells begins.
How often sex cells are made.