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WorksheetsGenetics Review
Total questions: 50
Worksheet time: 2hrs 39mins
Name
Class
Date
1.
True or False
Mendel determined that each parent contributes on factor for each trait in the offspring.
Mendel determined that each parent contributes on factor for each trait in the offspring.
a)
True
b)
False
2.
True or False:
Bird A has the genotype ll for bill length, and Bird B is LL. A short bill describes bird A's Genotype.
Bird A has the genotype ll for bill length, and Bird B is LL. A short bill describes bird A's Genotype.
a)
True
b)
False
3.
True or False:
A florist has a one of a kind plant that usually has beautiful red flowers, but sometimes has white flowers. If she crosses plants A and B as shown, 50% of the offspring will have red flowers.
A florist has a one of a kind plant that usually has beautiful red flowers, but sometimes has white flowers. If she crosses plants A and B as shown, 50% of the offspring will have red flowers.
a)
True
b)
False
4.
In the cross between two pea plants, the offspring are:
a)
100% smooth
b)
50% smooth and 50% wrinkled
c)
75% winkled and 25% smooth
75% wrinkled and 25% smooth
75% wrinkled and 25% smooth
d)
75% smooth and 25% wrinkled
5.
In a Punnett Square, a capital letter stands for a _____________ allele.
a)
recessive
b)
dominant
c)
homozygous
d)
heterozygous
6.
A Punnett Square shows you all the ways in which ___________ can combine.
a)
alleles
b)
eggs
c)
sperm
d)
colors
7.
A recessive trait is observed when _________ recessive genetic factors are present in offspring.
a)
1
b)
2
c)
3
d)
4
8.
A genetic factor that blocks another genetic factor is called a _______________.
a)
genetic trait
b)
heredity trait
c)
recessive trait
d)
dominant trait
9.
Of the following, which represents a homozygous recessive genotype?
a)
TT
b)
Tt
c)
tT
d)
tt
10.
Which of the following scientists is considered to be the father of modern genetics?
a)
Rosalind Franklin
b)
James Watson
c)
Gregor Mendel
d)
Francis Crick
11.
A ______ is part of the DNA code on a chromosome.
a)
Gene
b)
Genotype
c)
Phenotype
d)
Gender
12.
Which of the following is not one of the nitrogen bases that form the rungs of the DNA ladder?
a)
Adenine
b)
Cytosine
c)
Francine
d)
Thymine
13.
Mendel Tested _________ plants
a)
1
b)
5
c)
100
d)
Hundreds
14.
____________ is the study of how traits are passed from parent to offspring.
a)
Fertilization
b)
Selective Breeding
c)
Genetics
d)
Heredity
15.
A true breeding purple (dominant) plant and a true breeding white plant (recessive) cross-pollinate. The offspring will be __________.
a)
All purple
b)
half purple, half white
c)
75% purple, 25% white
d)
75% white, 25% purple
16.
Of the following, which is not a human blood phenotype?
a)
A
b)
B
c)
AB
d)
C
17.
A and B are the same kind of fish. A has a genotype for narrow fins (ww), and B has a genotype for wide fins (W-). Which of the following genotypes of parent fish will produce only offspring with wide fins?
a)
Ww and Ww
b)
WW and ww
c)
Ww and ww
d)
ww and ww
18.
Gregor Mendel studied heredity using ________ plants.
a)
Rose
b)
Pea
c)
Maize
d)
Tundra
19.
A heterozygous orange-flowered plant is crossed with a homozygous purple-flowered plant. If orange is a dominant allele and purple recessive, what color ratio will the flowers of the offspring plants have?
a)
1 purple: 3 orange
b)
4 purple: 0 orange
c)
2 purple: 2 orange
d)
0 purple: 4 orange
20.
The study of __________ is called Genetics.
a)
Dominance
b)
Heredity
c)
pea plants
d)
mutations
21.
A man and a woman want to have a child, but the man is heterozygous (Cc) for a recessive trait that causes a fatal illness. What is the probability of a child inheriting the trait?
a)
50%
b)
25%
c)
0%
d)
75%
22.
Blood type in humans is controlled by ______ alleles.
a)
1
b)
2
c)
3
d)
4
23.
Mendel concluded that _______ factors control each inherited trait.
a)
1
b)
2
c)
3
d)
4
24.
Parents pass their traits down to their offspring through their ______________.
a)
daughter cells
b)
son cells
c)
body cells
d)
reproductive cells
25.
When organisms have two different alleles for a trait, they are said to be ______________.
a)
homozygous
b)
purebred
c)
dominant
d)
heterozygous
26.
Different forms a gene has for a trait are called ________.
a)
genes
b)
alleles
c)
chromosomes
d)
strands
27.
The physical trait that you can see is called the ____________.
a)
genotype
b)
visible
c)
phenotype
d)
invisible
28.
Homozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
29.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
30.
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
31.
B = brown fur b = white fur
In the punnett square, what is the probability for white fur?
In the punnett square, what is the probability for white fur?
a)
0%
b)
25%
c)
50%
d)
75%
32.
In the punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
33.
Dominant or recessive?
tt
tt
a)
Dominant
b)
Recessive
34.
This image shows a...
a)
Punnett Square
b)
Phenotype
c)
Genotype
d)
Dominant allele
35.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
36.
The dominant trait as seen in this punnett square is
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
37.
What are the possible genotypes for this cross?
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
38.
An organism's genetic make-up:
a)
phenotype
b)
genotype
c)
dominant
d)
recessive
39.
In the punnett square shown, what is the genotypes of the two parents?
a)
RW and RR
b)
RW and WW
c)
RR and WW
d)
RW and RR
40.
What is another way of saying "purebred"?
a)
homozygous
b)
dominant
c)
recessive
d)
heterozygous
41.
A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?
a)
25%
b)
50%
c)
75%
d)
100%
42.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
BB
43.
What do the letters inside the grid of a Punnett square represent?
a)
phenotypes of parents
b)
genotypes of offspring
c)
testcrosses of offspring
d)
chromosomes of parents
44.
An alternative name for heterozygous
a)
Law of Independent Assortment
b)
Hybrid
c)
Homozgyous
d)
Heterozygous
45.
bb crossed with BB, what is the probability of Bb?
a)
0%
b)
25%
c)
50%
d)
100%
46.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
47.
Adenine bonds with ______________.
a)
Guanine
b)
Thymine
c)
Cytosine
d)
Adenine
48.
Guanine bonds with ______________.
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
49.
Why is DNA important?
a)
it is very small and very complicated
b)
it's in everything
c)
it serves as the blueprint for traits of all living things
d)
because we eat it every day for energy
50.
Refer to the illustration. Which box in the Punnett square represents a child who does not have freckles
a)
box 1
b)
box 2
c)
box 3
d)
box 4
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