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WorksheetsGenetics Review for TEST 19 OL
Total questions: 20
Worksheet time: 57mins
Name
Class
Date
1.
Aa, DD, Bb, yy are all examples of
a)
genotypes
b)
phenotypes
2.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
3.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
4.
Who is the Father of Genetics?
a)
Watson
b)
Crick
c)
Franklin
d)
Mendel
5.
The passing of traits from parents to offspring.
a)
Genetics
b)
Heredity
c)
Meiosis
d)
Mitosis
6.
The different forms of a gene are called
a)
Alleles
b)
Factors
c)
Masks
d)
Traits
7.
How many PAIRS of chromosomes does each human cell contain?
a)
2
b)
12
c)
23
d)
46
8.
Chromosomes are found in the ____________ of the cell
a)
Chloroplast
b)
Nucleus
c)
Cytoplasm
d)
Mitochondria
9.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
10.
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%
11.
In asexual reproduction, all of the offspring are:
a)
Physically Identical
b)
Genetically Identical
c)
Physically and Genetically Identical
d)
Not Identical
12.
Which of the following is the sex chromosome combination of a girl?
a)
xx
b)
xy
c)
x
d)
xyy
13.
What are the two ways that genetic disorders can be inherited?
a)
Through blood transfusions and meiosis.
b)
Mutations in DNA and changes in structure or number of chromosomes.
c)
Missing chromosomes or premature egg splitting.
d)
Unhealthy environments and heredity.
14.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
15.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
16.
AA and Aa always show up as
a)
dominant
b)
recessive
17.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
18.
What is the probability of heterozygous offspring?
a)
25%
b)
50%
c)
0%
d)
100%
19.
In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?
a)
0%
b)
25%
c)
50%
d)
75%
20.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
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