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WorksheetsGenetics & Heredity
Total questions: 50
Worksheet time: 52mins
Name
Class
Date
1.
Opal is a Cremello Morgan horse. Her genotype is CC x CC. She is considered a
a)
Homozygous Cream
b)
Heterozygous Cream
c)
Incomplete Cream
d)
Normal
2.
B - black, b - brown. Two black mice mate and have some black and some brown mice. What is the genotype of the parents?
a)
BB x Bb
b)
BB x bb
c)
Bb x Bb
d)
bb x bb
3.
If something is heterozygous, it is also...
a)
purebred
b)
hybrid
c)
dominant
d)
recessive
4.
This image shows a...
a)
Punnett Square
b)
Phenotype
c)
Genotype
d)
Dominant allele
5.
What does a Punnett Square help you do?
a)
Determine the ratio of phenotypes
b)
Determine the ratio of genotypes
c)
Predict possible traits the offspring will have
d)
All of the above
6.
A phenotype is the...
a)
letter combination
b)
dominant gene
c)
recessive gene
d)
physical appearance
7.
Another word for homozygous is...
a)
purebred
b)
hybrid
c)
heterozygous
d)
dominant
8.
Dominant alleles are represented by?
a)
capital
b)
lowercase
c)
both
d)
neither
9.
Recessive alleles are represented by?
a)
capital
b)
lowercase
c)
both
d)
neither
10.
The genotype Tt is considered?
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous dominant
d)
heterozygous recessive
11.
Purple is dominant to white. A heterozygous purple flower is crossed with a Homozygous white flower. What are the genotypes and phenotypes of the offspring?
P = Purple
p = White
P = Purple
p = White
a)
100% Pp (Purple)
b)
50% Pp (Purple); 50% pp (white)
c)
75% Pp (Purple); 25% pp (white)
d)
25% Pp (Purple) 75% pp (white)
12.
If the four existing children in a family are all sons, what chance would there be that the next child would also be a son?
a)
75%
b)
50%
c)
25%
d)
20%
13.
Which of the following genotypes is homozygous recessive?
a)
RR
b)
Rr
c)
rr
d)
None of the Above
14.
What percentage of the offspring in the punnett square are shown as a hybrid?
a)
100%
b)
75%
c)
50%
d)
25%
15.
What is the phenotype of the heterozygous parent in the punnett square?
Y= Yellow
y = Green
Y= Yellow
y = Green
a)
green
b)
yellow
c)
hybrid
d)
purebred
16.
The condensed or coiled form of DNA is called________________
a)
an allele
b)
a gene
c)
a chromosome
d)
a phenotype
17.
Where, in the eukaryotic cell, is DNA located?
a)
ribosomes
b)
nucleus
c)
E.R.
d)
cytoplasm
18.
Which of the following genotypes would be considered heterozygous?
a)
BB
b)
gg
c)
Ff
d)
TT
19.
An allele whose trait always shows up in the phenotype when the allele is present.
a)
recessive allele
b)
dominant allele
c)
hidden allele
d)
present allele
20.
A human normally has _____ total chromosomes.
a)
6
b)
22
c)
4
d)
46
21.
If a dominant trait and a recessive trait mix, and the phenotype is somewhere in the middle of both, this is called
a)
incomplete dominance
b)
complete dominance
c)
heterozygous dominance
d)
heterozygous recessive
22.
T = tall and t = short
TT and Tt would result in the following phenotype
TT and Tt would result in the following phenotype
a)
short
b)
tall
c)
both tall and short
d)
neither tall or short
23.
The passing of genetic traits from parent to offspring is called?
a)
heredity
b)
trait
c)
gene
d)
allele
24.
What is a factor that is masked by another trait?
a)
Recessive
b)
Dominant
25.
How many alleles (genes) does a child get from EACH parent for each trait?
a)
1
b)
2
c)
3
d)
4
26.
This type of reproduction requires two parents.
a)
sexual
b)
asexual
27.
This type of reproduction requires only one parent.
a)
sexual
b)
asexual
28.
The offspring from asexually reproduced organisms are?
a)
Different than their parents
b)
Identical to parents
c)
Like a combination from both parents
d)
A different species
29.
If two organisms reproduce sexually, then their offspring will exhibit a genetic makeup that is -
a)
identical to only one parent
b)
identical to all of its siblings
c)
a unique combination of traits
d)
the recessive traits of each parent
30.
All of the offspring of an organism have the same genetic material, which is identical to the parent organism. From this, we can conclude that this organism,
a)
makes its own food
b)
is unicellular
c)
live in a marine habitat
d)
reproduces asexually
31.
Jen has curly hair(DD), and Jim has strait hair (dd)
Their offspring has (Dd) wavy hair, which is neither curly or strait
What happened?
Their offspring has (Dd) wavy hair, which is neither curly or strait
What happened?
a)
Heterozygous dominance
b)
Heterozygous recessive
c)
incomplete dominance
d)
complete dominance
32.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
33.
What gender has an X and a Y chromosome?
a)
male
b)
female
c)
transgender
d)
all of the above
34.
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
35.
W=white hair
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
a)
none
b)
3/4
c)
1/2
d)
all
36.
The inherited combination of alleles is known as the offspring's
a)
heredity
b)
phenotype
c)
genotype
d)
redigree
37.
If a Homozygous red snapdragon and a Heterozygous pink snapdragon were crossed, what percentage of the offspring would be homozygous white?
a)
0%
b)
25%
c)
50%
d)
75%
38.
Snapdragon flowers come in red, pink, and white. What type of inheritance is the pink flower demonstrating?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Codominance
d)
Polygenic Inheritance
39.
A corn plant that is heterozygous for tall sprouts mates with a corn plant that is homozygous for short sprouts. If tall sprouts are dominant, how many different phenotypes are possible in the offspring?
a)
1
b)
2
c)
3
d)
4
40.
Two brown eyed parents, both with a (Bb) genotype, have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
41.
If a heterozygous tall pea plant is crossed with a homozygous short pea plant, what are the possible genotypes of the future offspring?
a)
100% Tt
b)
50% Tt, 50% tt
c)
75%Tt, 25%tt
d)
25%TT, 50%Tt, 25%tt
42.
This is an example of what?
a)
Complete dominance
b)
Incomplete dominance
c)
Codominance
d)
None of the above
43.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
44.
Magda is a tall, 11 year old drummer. She has a scar on her right cheek. She is good at swimming. Which of her traits did Magda most likely inherit?
a)
height
b)
the scar
c)
ability to swim
d)
ability to play drums
45.
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
46.
Squidward has light blue skin, and his genotype for this trait is Bb. Would Squidward be considered a purebred or hybrid for light blue skin?
a)
Purebred
b)
Hybrid
47.
The man who studied genetics and developed our understanding of genetic inheritance is?
a)
Watson
b)
Crick
c)
Mendel
d)
Darwin
48.
Horses that are homozygous for the black gene, like Black Jack, are represented by (BB) and will always pass one (B) to offspring. Horses that are homozygous for the red gene, like Roxie, are represented by (rr) and will always pass one (r) to offspring. If Black Jack and Roxie are bread their offspring will have?
a)
100% Black Phenotype
b)
50% Black Phenotype
c)
100% Red Phenotype
d)
50% Red Phenotype
49.
The image represents a pedigree for a family afflicted by Cystic Fibrosis. What is the ratio of males who are carriers for the disease?
a)
4:6 or 66%:
b)
3:5 or 60%
c)
4:5 or 80%
d)
6:6 or 100%
50.
Heredity information, coded by DNA, is passed down from generation to generation
a)
through complete dominance.
b)
through the Law of Segregation.
c)
through Genetic Drift.
d)
in a predictable way.
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