WorksheetsPunnet Squares and Pedigrees
Total questions: 40
Worksheet time: 3hrs 35mins
Name
Class
Date
1.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
2.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
3.
How many boxes would say BB?
a)
1
b)
2
c)
4
d)
0
4.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
5.
In a certain species of rabbits, black coat color is dominant over brown coat color. What is the probability of producing a rabbit with brown coat color from two rabbits that are both heterozygous for black coat color?
a)
0%
b)
25%
c)
75%
d)
100%
6.
Tay-Sachs disease is a lethal, autosomal recessive genetic disorder. If both parents are heterozygous carriers of the disease, what are the chances of them having a child who is also a heterozygous carrier for Tay-Sachs?
a)
0%
b)
25%
c)
50%
d)
75%
7.
Biologists have found that a form of deafness is a recessive trait in dogs. If a female dog that is heterozygous for the trait mates with a male dog that is deaf, what percent of their offspring will be deaf?
a)
0%
b)
50%
c)
75%
d)
100%
8.
What does a punnet square show us?
a)
The age of the offspring
b)
The chance of a genotype (trait) showing up in offspring
c)
Numbers
d)
Blue eyes
9.
Father of genetics; 1st person to use probability to explain heredity.
a)
Mendeleev
b)
Mendel
c)
Darwin
d)
Currie
10.
The passing of traits from a parent to their offspring.
a)
Traits
b)
Characteristics
c)
Heredity
d)
Genetics
11.
Lower case letter; this represents what is hidden when a dominant allele is present
a)
recessive
b)
homozygous
c)
dominant
d)
heterozygous
12.
Which is homozygous dominant?
a)
AA
b)
Aa
c)
aa
d)
None of them
13.
Which is homozygous recessive?
a)
AA
b)
Aa
c)
aa
d)
None of them
14.
Two genes for flower color in snapdragons are red and white. When a red flower is mated with a white flower, all of the offspring have pink flowers. What kind of inheritance must this be?
a)
sex-linked inheritance
b)
recessive
c)
incomplete dominance
d)
dominant
15.
What pattern of inheritance is shown in this image?
a)
Codominance
b)
Incomplete dominance
c)
Polygenic traits
16.
What organism did Mendel do his famous studies of genetics with?
a)
bees
b)
carrots
c)
peas
d)
mice
17.
Gary Goldfish is heterozygous for dark orange color. Ginny Goldfish is homozygous dominant. Their baby has light orange color. Is Gary the father?
a)
Yes, because the light orange color is dominant
b)
No, because there is no way they could produce a homozygous recessive baby
c)
Yes, because Ginny has two alleles for light orange color, so their baby could be light orange
d)
No, because Gary does not have the allele for light color.
18.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
19.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
20.
What does a filled in square represent?
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
21.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
22.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
23.
This pedigree represents the inheritance of hemophilia in this family. How many of the females have the hemophilia trait?
a)
8
b)
5
c)
2
d)
3
24.
What do half colored symbols represent?
a)
The individual is a carrier (heterozygous).
b)
The individual expresses the trait.
c)
The individual has both recessive alleles.
d)
The individual has both dominant alleles.
25.
What does an open circle represent?
a)
Not Affected Male
b)
Not Affected Female
c)
Affected Male
d)
Affected Female
26.
Is this trait (the shaded individuals) dominant or recessive?
a)
dominant
b)
recessive
27.
In the second generation-how many people are carriers of the trait?
a)
2
b)
3
c)
5
d)
6
28.
How many people in this whole pedigree have the trait/disease?
a)
2
b)
3
c)
4
d)
6
29.
How many females are in this pedigree?
a)
3
b)
4
c)
6
d)
7
30.
Which gender can be carriers of colorblindness and not have it?
a)
Just males
b)
Just females
c)
Both genders
31.
What is the mode of inheritance shown here?
a)
Autosomal Dominant
b)
Autosomal Recessive
c)
Sex Linked Recessive
32.
What is the mode of inheritance shown here?
a)
Autosomal Recessive
b)
Sex Linked
c)
Autosomal Dominant
33.
What is the mode of inheritance shown here?
a)
Autosomal Dominant
b)
Sex Linked
c)
Autosomal Recessive
34.
What is the mode of inheritance shown here?
a)
Autosomal Recessive
b)
Autosomal Dominant
c)
Sex Linked
35.
What is the relationship between person I 1 and III 2?
a)
Father and Son
b)
Father and Daughter
c)
Grandfather and Granddaughter
d)
Uncle and Niece
36.
Which of the following combinations of sex chromosomes represent a female?
a)
XY
b)
XXY
c)
XX
37.
What does a horizontal line between a square and a circle mean?
a)
They are siblings
b)
They are cousins
c)
They are married ("together")
d)
They are the children
38.
What does a vertical line coming down from a square and circle that are connected by horizontal line indicate?
a)
They are cousins
b)
The children
c)
Aunts and Uncles
39.
Which members of this family are afflicted with (have) Huntington's Disease?
a)
I-1, II-2, II-3, II-7, and III-3
b)
I-1, I-2, II-3, II-7, and III-5
c)
I-1, I-3, II-8, and III-2
d)
I-2, II-1, II-4, II-5, II-6, II-8, III-1, III-2, III-4, and III-5
40.
There are no carriers for Huntington's Disease- you either have it or you don't. Is Huntington's disease caused by a dominant or recessive trait?
a)
Dominant
b)
Recessive
100 %
