
Intro to Punnett Squares Accelerated
Presentation
•
Biology
•
9th - 10th Grade
•
Medium
Standards-aligned
Joanna Giddings
Used 264+ times
FREE Resource
10 Slides • 11 Questions
1
2
Punnett squares are used to make predictions about which traits offspring will get from their parents.
It is important to remember that Punnett squares are theoretical; they show us the probability of offspring inheriting a particular trait. The proportions predicted using Punnett squares may or may not happen in any particular family.
3
Watch the following video segment by clicking on it on the next slide, and then answer the questions.
4
5
Multiple Choice
Hairlessness in guinea pigs is a __________ trait.
dominant
recessive
6
Multiple Select
In the hairless guinea pig scenario, the capital letter H represents (choose all that apply).
the dominant allele
the recessive allele
hair
no hair
7
Multiple Choice
A hairless guinea pig has two recessive alleles.
True
False
8
Watch the following video segment by clicking on it on the next slide, and then answer the questions.
9
10
Multiple Select
The genotype(s) for guinea pigs with hair is/are
HH
Hh
hh
11
Multiple Select
The genotype(s) for a hairless guinea pig is/are (choose all that apply)
HH
Hh
hh
12
Multiple Select
Which genotype(s) is/are homozygous? (choose all that apply)
HH
Hh
hh
13
Multiple Select
Which genotype(s) is/are heterozygous? (choose all that apply)
HH
Hh
hh
14
Watch the following video segment by clicking on it on the next slide, and then answer the questions.
15
16
Multiple Choice
The correct way to write a heterozygous genotype is
Hh
hH
17
Multiple Choice
How many traits are examined in a monohybrid cross?
0
1
2
3
18
Multiple Choice
When two heterozygous parents are crossed, what portion of the offspring will have the recessive trait?
0%
25%
50%
75%
100%
19
Watch the following video segment by clicking on it on the next slide, and then answer the questions.
20
21
Multiple Choice
Can Punnett squares guarantee the outcome of a particular cross?
Yes, absolutely!
No, they provide a prediction of what is likely to happen
Show answer
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