
Punnett Squares Notes
Presentation
•
Science
•
6th - 8th Grade
•
Hard
Joseph Anderson
FREE Resource
15 Slides • 19 Questions
1
2
3
4
Open Ended
Define Heredity in your own words.
5
6
Open Ended
Let's Review! What is the relationship between chromosomes and DNA?
7
8
Labelling
Label the correct location of the genetic material.
DNA
Chromosome
Gene
Nucleus
9
Open Ended
What do you think the words genotype and phenotype mean in this picture?
10
11
12
Open Ended
What does the allele indicate in this pair of homologous chromosomes?
13
14
Multiple Choice
How many copies of the allele is needed for the trait to show?
One
Two
None
Three
15
16
17
Multiple Select
Using the table here, if a cow only had the dominant phenotypes, what traits would be shown? Select all that apply.
No horns
Horns
Black Coat
Red Coat
White Face
18
Multiple Select
Individual cows who do not show phenotypes related to recessive traits could have what types of genotypes? Select all that could be true.
homozygous dominant (AA)
heterozygous (Aa)
homozygous recessive (aa)
19
20
Multiple Choice
What is the phenotype for a heterozygous flower?
Purple
White
BB
Bb
bb
21
Multiple Choice
What is the genotype for a homozygous recessive flower?
Purple
White
BB
Bb
bb
22
Categorize
Bb
BB
bb
Match each genotype with the correct label.
23
24
Multiple Choice
If the "A" represents red flowers and "a" represents green flowers, what are the chances of the flowers being green?
25%
50%
75%
100%
25
26
27
Draw
Fill in the boxes for each genotype.
28
29
Multiple Choice
What percentage will of the pea pods will be yellow?
25%
50%
75%
100%
30
Multiple Choice
What percentage will of the pea pods will be green?
25%
50%
75%
100%
31
Draw
Cross the two parent cats and determine the percent chance the offspring will have a long tail.
1) Draw the alleles in each box of the Punnett Square.
2) CIRCLE the percentage that the offspring will have a long tail.
32
Open Ended
Cat fur color is a combination of many genes and cannot be calculated with one Punnett square. Cat fur length, however, is a one gene inherited trait where short hair (L) is dominant to long hair (l).
Based on the facts above, why are most stray cats short hair cats, but a variety of colors?
33
Open Ended
Cat fur color is a combination of many genes and cannot be calculated with one Punnett square. Cat fur length, however, is a one gene inherited trait where short hair (L) is dominant to long hair (l).
Based on the facts above, can two long hair cats have short hair kittens? Why or why not?
34
Open Ended
Explain how Punnett squares are used to describe the genetic relationship between parent to offspring.
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