Download Mitosis vs Meiosis wksheet

SNC 1D
How Do the Number of Chromosomes in Body Cells and Sex
Cells Compare?
Name: ___________
Date: ___________
Think About It
What do peas, tomatoes, rabbits, chickens and crayfish have in common? What do they have
in common with you? You might think that you have nothing in common with these organisms.
This activity will show you that you do share certain common characteristics, even with a
pea.
1.
Based on the notes you have done in class about body cells and sex cells, mitosis and
meiosis, fill in the following table.
Cell Chart
Organism
Number of Body Cell
Number of Egg
Number of Sperm
Chromosomes
Chromosomes
Chromosomes
human
46
23
23
pea
14
7
7
tomato
24
corn
10
rabbit
22
chicken
78
mouse
20
crayfish
100
2. Fill in the blanks in the following statements.
There is a major difference between the number of chromosomes contained in a
body cell and in a sex cell. Every cell of your body has the same number of
chromosomes EXCEPT the ___________________. These cells have exactly
________ the number of chromosomes as a body cell.
3. The muscle cells in a housefly’s leg are found to contain 24 chromosomes. If each of
the following cell types came from a housefly, how many chromosomes would each
contain?
a) sperm cell ________
b) body cell ________
c) egg cell
________
d) eye cell ________
4. Fill in the blanks… In the spaces provided, write the word or phrase from the list
provided that best completes each sentence. List words may be used more than
once.
List Words:
mitosis, body cells, sperm, chromosomes, sex cells, eggs
a) Organisms produce _____________________ using mitosis.
b) The main job of __________________ is to join together to produce a new
organism.
c) In humans, _________________ have 46 chromosomes.
d) Se cells are the only cells that are not produced by ________________ .
e) The __________ are the female sex cells.
f) The __________ are the male sex cells.
g) _____________________ contain the instructions that tell a cell how to
develop.
5. The eggs of basset hounds contain 39 chromosomes.
a) How many chromosomes are in basset hound body cells? __________
b) How many chromosomes are in the sperm of a collie? ____________
6. A goldfish has 94 chromosomes in each of its body cells, a human has 46, and a
guinea pig has 64. What does this suggest about the complexity of an organism and
the number of chromosomes it may have?
7. Write a statement stating the relationship between the numbers of chromosomes in
body cells compared to sex cells.
General Review of Terms Relating to Mitosis and Meiosis
8. Match each of the following terms with its definition(s). If a definition is given
more than one blank it means there is more than one term that can fit.
Term
Definition
a) sex cell
___
ovaries and testes; where sex cells are made
b) gamete
___ ___
sperm cells and egg cells
c) zygote
___
means the cell contains ½ as many chromosomes as a
body cell
d) mitosis
___
means the cells contains twice as many chromosomes as
a sex cell
e) diploid
___
cell division used to produce more body cells
g) meiosis
___
cell division used to produce sex cells
h) haploid
___
cell resulting from the fusion of egg and sperm
i) gonad
9. Circle the word(s) within the brackets to make each statement true.
a) Asexual reproduction requires (one, two) cells/organisms.
b) Sexual reproduction requires the fusion of two different (gametes, gonads,
zygotes). Usually one of these comes from a male organism and the other
one comes from a female organism.
c) Before sexual reproduction occurs, the female sex cell must be produced in
the female (gamete, gonad, zygote) called the (testis, ovary, uterus,
scrotum).
d) Before sexual reproduction occurs, the male sex cell must be produced in
the male (gamete, gonad, zygote) called the (testis, ovary, uterus,
scrotum).
e) Body cells are (haploid, diploid) and sex cells contain half as many
chromosomes as they do so they are called (haploid, diploid).
f) Mitosis produces (one, two, three, four) cells that are genetically (the
same, different) from the original cell and genetically (the same,
different) from each other.
g) Meiosis produces (one, two, three, four) cells that are genetically
(the same, different) from the original cell and genetically
(the same, different) from each other.
h) In male (gonads, gametes) meiosis generally produces (one, two, three,
four) healthy sperm cells or (gonads, gametes). In female (gonads,
gametes) meiosis generally produces four cells but only (one, two, three,
four) has/have enough cytoplasm to be healthy egg cells or
(gonads, gametes).
i) When a male gamete and a female gamete fuse, the result is a
(gonad, gamete, zygote).
j) To produce a healthy offspring, a zygote must grow and produce many more
cells by the process of (meiosis, mitosis). Eventually the offspring will grow
to sexual maturity and then produce its own sperm and egg cells using the
process of (meiosis, mitosis) in its (gametes, gonads).