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WorksheetsPedigrees and punnetts
Total questions: 30
Worksheet time: 2hrs 51mins
Name
Class
Date
1.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
2.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
3.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
4.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
5.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
6.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
7.
T - tall and t = short
In the punnett square below, what belongs in the missing square
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
8.
B = brown eyes
b = blue eyes
What is true about these two brothers that have brown eyes?
One has genotype BB the other Bb.
b = blue eyes
What is true about these two brothers that have brown eyes?
One has genotype BB the other Bb.
a)
they have same phenotype and genotype
b)
they have different genotypes and phenotypes
c)
they have same phenotype but different genotypes
d)
they have same genotype but different phenotypes
9.
aa always shows up as
a)
dominant
b)
recessive
10.
Aa is
a)
homozygous
b)
heterozygous
11.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
12.
What ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness?
a)
0 in 4
b)
1 in 4
c)
2 in 4
d)
4 in 4
13.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
14.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
15.
What type of heredity is shown in the pedigree?
(hint: check your notes - "modes of inheritance")
(hint: check your notes - "modes of inheritance")
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive
16.
What gender has an X and a Y chromosome?
a)
male
b)
female
c)
transgender
d)
all of the above
17.
How many females are in this pedigree?
a)
3
b)
4
c)
6
d)
7
18.
How many of the males in this pedigree show the trait being studied?
a)
2
b)
3
c)
4
d)
6
19.
If this pedigree shows an autosomal recessive disorder, what MUST the genotype of individual II-3 be?
a)
HH
b)
Hh
c)
hh
d)
None of the above
20.
How are individuals III-2 and II-4 related?
a)
Cousins
b)
Dad and Daughter
c)
Uncle and Niece
d)
Grandpa and Granddaughter
21.
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
22.
Huntington's Disease is a dominant trait.
What is the correct genotype for individual I-2?
What is the correct genotype for individual I-2?
a)
HH
b)
Hh
c)
hh
d)
H_
23.
Hemophilia is a recessive sex-linked trait. If H = normal & h = has hemophilia, which genotype represents a male with hemophilia.
a)
XHY
b)
XHXh
c)
XhXh
d)
XhY
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 is the genotype of the mother?
a)
BB
b)
bb
c)
Bb
d)
BB or Bb
26.
Wet earwax is a dominant trait (E), dry earwax is recessive trait (e). What is the sex, phenotype, and genotype of individual III-4?
a)
male, wet earwax, Ee
b)
male, dry earwax, ee
c)
male, wet earwax EE
d)
male, wet earwax, cannot tell genotype
27.
What type of heredity is shown in the pedigree?
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive
28.
If this pedigree shows a recessive disorder, what MUST the genotype of individual 4 be?
a)
HH
b)
Hh
c)
hh
29.
This trait is recessive. What is the genotype for person II-1?
a)
GG
b)
Gg
c)
gg
d)
can't be determined
30.
This trait is
a)
autosomal recessive.
b)
sex-linked recessive.
c)
autosomal dominant.
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