Download Genetic Material - School

DNA
LABEL YOUR
WORKSHEET
CHROMOSOME
CELL
NUCLEUS
GENE
DNA
FEMALE
MALE
FERTILISATION
COPY THIS DIAGRAM
Sperm are
made
in the man’s
testes
Eggs are
made in
the woman's
ovaries
AN EGG CELL
A SPERM CELL
Nucleus containing 23 chromosomes
This is a fertilised
egg cell or zygote.
The cells are
dividing rapidly.
Each
cell contains a
nucleus with 46
chromosomes in it
(23 from the mother
and 23 from the
father).
All
COPY ME
female eggs
contain an X
chromosome.
But sperm can
contain either an X
chromosome or a Y
chromosome.
= GIRL
XY= BOY
XX
Women have 2 X
chromosomes in each cell
except for their sex cells.
TRUE
TRUE or FALSE
Men have 1 Y chromosome
in each cell.
TRUE or FALSE
FALSE
Human egg cells contain 46
chromosomes.
TRUE or FALSE
FALSE
Every sperm has an X
chromosome. Half of all
sperm also have a Y
chromosome.
FALSE
TRUE or FALSE
If a sperm with a Y
chromosome fertilizes an
egg, the embryo develops
female sex organs.
FALSE
TRUE or FALSE
Your eye colour depends
only on your genes, so eye
colour is an inherited
characteristic.
TRUE
TRUE or FALSE
You cannot influence
characteristics that depend
on both genetic and
environmental factors.
FALSE
TRUE or FALSE
Different versions of the
same gene are called
alleles.
TRUE or FALSE
TRUE