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WorksheetsGenetics/Heredity Test Review
Total questions: 50
Worksheet time: 43mins
Name
Class
Date
1.
The passing of traits from parent to offspring
a)
Heredity
b)
Genetics
c)
Hybrid
d)
Probability
2.
Who was the father of genetics
a)
Sagan
b)
Issac Newton
c)
Gregor Mendel
d)
C.jenkins
3.
Which is heterozygous ?
a)
Tt
b)
TT
4.
Which is homozygous ?
a)
Zz
b)
SS
5.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
6.
Having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
7.
Having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
8.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
9.
Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
10.
A genetic disorder is an abnormal condition that a person inherits through genes or chromosomes?
a)
True
b)
False
11.
Some genetic disorders are caused by what?
a)
alleles
b)
Mutations in the DNA of genes
c)
Phenotype
d)
Genotype
12.
What genetic disorder is when a person's blood clots very slowly or not at all?
a)
Down Syndrome
b)
Hemophilia
c)
Cystic Fibrosis
d)
Sickle-Cell
13.
In what disorder does a person have an extra copy on its 21 chromosome?
a)
Down Syndrome
b)
Sickle-Cell
c)
Hemophilia
d)
Cystic Fibrosis
14.
Which of the following is the sex chromosome combination of a girl?
a)
xx
b)
xy
c)
x
d)
xyy
15.
Looking at this pedigree, how many family members have the disease?
a)
4
b)
7
c)
All
d)
None
16.
Looking at this pedigree, how many female family members are carriers?
a)
1
b)
3
c)
10
d)
7
17.
I have 1 X chromosome and 1 Y chromosome. What am I?
a)
Male
b)
Female
18.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be what?
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
19.
Give the genotype for person II-1
a)
GG
b)
Gg
c)
gg
20.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
21.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above
22.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
23.
In the second generation-how many people have the disease or display the physical trait?
a)
2
b)
4
c)
5
d)
6
24.
Males are more likely to suffer from a sex-linked disease or disorder because
a)
males are the weaker sex
b)
males have less DNA
c)
males have 1 X chromosome, so the disorder is more likely to be expressed
25.
What did Gregor Mendel use to discover the principles that rule heredity?
a)
Pea Plant
b)
Pigeons
c)
Pear trees
d)
Photosynthesis
26.
What is another way of saying "purebred"?
a)
homozygous
b)
dominant
c)
recessive
d)
heterozygous
27.
bb crossed with BB, what is the probability of Bb?
a)
0%
b)
25%
c)
50%
d)
100%
28.
The scientific study of heredity is ____.
a)
Genetics
b)
Punnett squares
c)
Inheritance
d)
Biology
29.
Each one of the boxes on the Punnett Square represents what probability of an offsprings' genotype?
a)
25%
b)
1%
c)
10%
d)
0%
30.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
31.
What is the phenotype of the offspring? (A-Brown hair; a-blond hair)
a)
50 % Brown Hair and 50% Blond Hair
b)
25 % Brown Hair and 75% Blond Hair
c)
75 % Brown Hair and 25% Blond Hair
d)
0% Brown Hair and 100% Blond Hair
32.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
33.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?
a)
rr
b)
R
c)
RR
d)
RR or Rr
34.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
35.
A homozygous dominant brown mouse is crossed with a heterozygous brown mouse. Tan is the recessive color.
(HINT: make a Punnett Square)
a)
100 % tan
b)
100 % brown
c)
50 % brown and 50% tan
d)
75 % brown and 25 % tan
36.
Sexual reproduction requires _____ parents and asexual reproduction requires ___ parents
a)
1,1
b)
2,2
c)
2,1
d)
1,2
37.
Where does an off spring get its traits in asexual reproduction?
a)
From both parents
b)
From only one parent
c)
From neither parent
d)
There are no traits handed down
38.
Penguins lay 1-2 fertilized eggs that the male and female take turns incubating on their feet. What type of reproduction does this example represent?
a)
Sexual reproduction
b)
Asexual reproduction
39.
California blackworms, also known as mudworms, are able to break apart. Each body section that broke apart is able to become an identical new worm. What type of reproduction does this example represent?
a)
Sexual reproduction
b)
Asexual reproduction
40.
Reproducing asexually will produce offspring ...
a)
genetically different from each other
b)
genetically identical to the parent
41.
The genetic instructions are found in ---- within the DNA
a)
traits
b)
chromosomes
c)
genes
d)
DNA
42.
What phase of mitosis is shown in the picture?
a)
Prophase
b)
Anaphase
c)
Telophase
d)
Metaphase
43.
Chromatid pairs line up in the middle of the cell.
a)
Metaphase
b)
Telophase
c)
Anaphase
d)
Interphase
44.
What phase of mitosis is shown in the picture?
a)
Prophase
b)
Anaphase
c)
Telophase
d)
Metaphase
45.
What phase of mitosis is shown in the picture?
a)
Prophase
b)
Anaphase
c)
Telophase
d)
Metaphase
46.
How many chromosomes does a human cell have?
a)
42
b)
46
c)
24
d)
64
47.
How many daughter cells are produced in mitosis?
a)
1
b)
2
c)
4
d)
6
48.
Which of the following lists, in order, the phases of mitosis?
a)
interphase, metaphase, anaphase, telophase
b)
prophase, metaphase, anaphase, telophase
c)
prophase, metaphase, anaphase, interphase
d)
prophase, anaphase, metaphase, telophase
49.
Identify the stage of mitosis.
a)
interphase
b)
prophase
c)
anaphase
d)
cytokinesis
50.
Which of the following cell types is formed by meiosis?
a)
muscle cells
b)
skin cells
c)
sperm cells
d)
blood cells
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