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WorksheetsLesson
Total questions: 22
Worksheet time: 54mins
Name
Class
Date
1.
Phenotype refers to the _________ of an individual
a)
genetic makeup
b)
physical appearance
c)
recessive alleles
d)
dominant alleles
2.
When the genotype consists of a dominant and a recessive allele, the phenotype will be like the ______________ allele.
a)
dominant
b)
recessive
c)
both
d)
neither
3.
Which of these would best be described as a phenotype?
a)
blue eyes
b)
mutation
c)
Bb
d)
Tt
4.
A pea plant is heterozygous for height (Tt) and it is crossed with a homozygous short (tt) plant. Use a Punnett square to determine the probability of one of their offspring being short.
a)
100%
b)
75%%
c)
50%
d)
25%
5.
How are individuals I-2 and III-5 related?
a)
Grandpa and grandson
b)
Mom and son
c)
Uncle and nephew
d)
Grandma and grandson
6.
What are the phenotype percentages of the offspring?
(A-Brown fur color; a-white fur color)
a)
50 % Brown fur and 50% White fur
b)
25 % Brown fur and 75% White fur
c)
75 % Brown fur and 25% White fur
d)
0% Brown fur and 100% White fur
7.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
8.
One dog carries homozygous, long-haired traits (SS), and its mate carries homozygous short-haired traits (ss). Use a Punnett square to determine the probability of one of their offspring having long hair.
a)
100%
b)
75%
c)
50%
d)
25%
9.
In the second generation-how many people have the disease or display the physical trait?
a)
2
b)
4
c)
5
d)
6
10.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
11.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
12.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
13.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
14.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
15.
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
16.
How are individuals III-2 and II-4 related?
a)
Cousins
b)
Dad and Daughter
c)
Uncle and Niece
d)
Grandpa and Granddaughter
17.
How many females are in this pedigree?
a)
3
b)
4
c)
6
d)
7
18.
What do half colored symbols represent?
a)
The individual is a carrier.
b)
The individual expresses the trait.
c)
The individual has both recessive alleles.
d)
The individual has both dominant alleles.
19.
a)
Not affected male
b)
Not affected female
c)
Affected male
d)
Affected female
20.
How many girls in this family express this recessive disorder?
a)
4
b)
5
c)
6
d)
7
21.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
22.
If a heterozygous parent and a homozygous recessive parent mate, what percentage of their offspring will be dominant?
a)
25%
b)
50%
c)
75%
d)
100%
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