This document provides information about genetics and Punnett squares. It begins with learning objectives related to furthering knowledge of genetics using Punnett squares. It then provides information about genes, alleles, dominant and recessive traits, and examples of genetic crosses and Punnett squares. The document seeks to build understanding of concepts like what genes and alleles are, the difference between dominant and recessive, and how to use Punnett squares to determine the probabilities of inheriting certain traits. Various practice problems and self-assessment questions are included to help solidify these genetics concepts.

1. Objective: To further our knowledge of genetics using punnet squares.
Specialised Cells
PICTURE TITLE PAGE
New technology : Genetics

2. Objective: To further our knowledge of genetics using punnet squares.
Genetics
Silent Starter: Why do we look different
to our brothers and sisters even if we
have the same parents? (FULL
SENTENCES)
Grade Objective Outcomes
1/2 To further our
knowledge of
genetics using
punnet squares.
To state what is meant by allele
3/4
To describe the difference between dominant and
recessive alleles
Use a Punnet square to show what happens during a
genetic cross
5+
EXTENSION: Write down as many examples of ways we
can vary from each other and construct a Venn diagram
(inherited/genetic/both)

3. Objective: To further our knowledge of genetics using punnet squares.
What is a gene?
What is an allele?

4. Objective: To further our knowledge of genetics using punnet squares.
For each __________, you have two
genes. One ____ is inherited from
your mother, and one from your
_____. These two genes may be the
same, or _______. Different forms
of the same gene are called ______
WORD BANK SUPPORT: father, different, gene
alleles, characteristic
EXTENSION: What is the difference between a gene
and an allele? Give an example

5. Objective: To further our knowledge of genetics using punnet squares.
For each characteristic, you have two
genes. One ____ is inherited from
your mother, and one from your
_____. These two genes may be the
same, or _______. Different forms
of the same gene are called ______

6. Objective: To further our knowledge of genetics using punnet squares.
For each characteristic, you have two
genes. One gene is inherited from
your mother, and one from your
_____. These two genes may be the
same, or _______. Different forms
of the same gene are called ______

7. Objective: To further our knowledge of genetics using punnet squares.
For each characteristic, you have two
genes. One gene is inherited from
your mother, and one from your
father. These two genes may be the
same, or _______. Different forms
of the same gene are called ______

8. Objective: To further our knowledge of genetics using punnet squares.
For each characteristic, you have two
genes. One gene is inherited from
your mother, and one from your
father. These two genes may be the
same, or different. Different forms
of the same gene are called ______

9. Objective: To further our knowledge of genetics using punnet squares.
For each characteristic, you have two
genes. One gene is inherited from
your mother, and one from your
father. These two genes may be the
same, or different. Different forms
of the same gene are called alleles

10. Objective: To further our knowledge of genetics using punnet squares.
What is the difference between dominant and
recessive?
Answer the video task questions on your sheet

11. Objective: To further our knowledge of genetics using punnet squares.
In mice, black fur is dominant(B)
and white fur is recessive(b)
State the fur colour a mouse
would have with the following
allele conditions:
BB

12. Objective: To further our knowledge of genetics using punnet squares.
In mice, black fur is dominant(B)
and white fur is recessive(b)
State the fur colour a mouse
would have with the following
allele conditions:
Black

13. Objective: To further our knowledge of genetics using punnet squares.
In mice, black fur is dominant(B)
and white fur is recessive(b)
State the fur colour a mouse
would have with the following
allele conditions:
bb

14. Objective: To further our knowledge of genetics using punnet squares.
In mice, black fur is dominant(B)
and white fur is recessive(b)
State the fur colour a mouse
would have with the following
allele conditions:
White

15. Objective: To further our knowledge of genetics using punnet squares.
In mice, black fur is dominant(B)
and white fur is recessive(b)
State the fur colour a mouse
would have with the following
allele conditions:
Bb

16. Objective: To further our knowledge of genetics using punnet squares.
In mice, black fur is dominant(B)
and white fur is recessive(b)
State the fur colour a mouse
would have with the following
allele conditions:
Black

17. Objective: To further our knowledge of genetics using punnet squares.
Level 1-2
What is an allele?
Level 2
What is the difference
between a gene and an allele?
Level 2-3
How many copies of a
recessive allele is needed
to be expressed?
Level 3+
What is the difference
between dominant and
recessive allele?
Learning
Checkpoint
Which level are you working at so far?

18. Objective: To further our knowledge of genetics using punnet squares.
You have achieved
a level
because……..
Peer assess – Purple pen

19. Objective: To further our knowledge of genetics using punnet squares.
Earwax
The allele for wet earwax (W) is dominant
over the allele for dry earwax (w).
W
w
w
Ww Ww
Ww Ww
Probability
of a child
with dry
earwax
0%
W

20. Objective: To further our knowledge of genetics using punnet squares.
Polydactyly
The allele for six fingers (P) is
dominant over the allele for five
fingers (p).
P
p
p
Pp pp
Pp pp
Probability
of a child
with six
fingers
50%
p

21. Objective: To further our knowledge of genetics using punnet squares.
Meet Ben
Ben is puzzled.
Ben has brown hair, but his parents
both have blonde hair
Use this Punnet square below to show
how this may be possible

22. Objective: To further our knowledge of genetics using punnet squares.
Practice Exam Questions
Use a Punnet square to calculate and explain the chance of
a person inheriting freckles if their mother has alleles Ff
and their father has ff. Freckles are the dominant
characteristic (6 marks)

23. Objective: To further our knowledge of genetics using punnet squares.
F
f ff
Ff ff
f
Use a Punnet square to calculate and explain the
chance of a person inheriting freckles if their
mother has alleles Ff and their father has ff.
Freckles are the dominant characteristic (6 marks)
f
Ff Probability of
a child with
freckles
75%
Out of 6 I
achieved……
Next time I
will include:

24. Objective: To further our knowledge of genetics using punnet squares.
Resources

25. Objective: To further our knowledge of genetics using punnet squares.
Learning
Checkpoint

26. Objective: To further our knowledge of genetics using punnet squares.
1.
How
many
alleles
are
there
for
every
gene?
2.
Name
two
examples
of
traits,
genes
code
for
3.
What
are
the
different
types
of
allele?
4.
What
is
used
to
represent
to
different
alleles?
5.
If
“F”
is
orange
fur,
list
the
different
allele
pairing
for
orange
or
grey
fur
1.
How
many
alleles
are
there
for
every
gene?
2.
Name
two
examples
of
traits,
genes
code
for
3.
What
are
the
different
types
of
allele?
4.
What
is
used
to
represent
to
different
alleles?
5.
If
“F”
is
orange
fur,
list
the
different
allele
pairing
for
orange
or
grey
fur