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WorksheetsGenetics by Mrs. Schott
Total questions: 37
Worksheet time: 1hrs 22mins
Name
Class
Date
1.
What characteristic would a child NOT inherit from parents?
a)
freckles
b)
eye color
c)
hair style
d)
dimples
2.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
3.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
4.
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%
5.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous genes
d)
mutated DNA
6.
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
7.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
8.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
9.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
10.
Who is considered the "father of genetics"?
a)
Gregor Mendel
b)
Reginald Punnett
c)
James Watson
d)
Justin Bieber
11.
The scientific study of heredity is ____.
a)
Genetics
b)
Punnett squares
c)
Inheritance
d)
Biology
12.
If one stronger trait "covers" up another weaker trait, the trait that covers the other is said to be:
a)
Dominant
b)
Heterozygous
c)
Recessive
d)
Hidden
13.
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
14.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
15.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
16.
What determines gender in humans?
a)
the X and Y chromosome
b)
chromosome 21
c)
codominance
d)
epistasis
17.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
18.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
19.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
20.
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
21.
What ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness?
a)
0 in 4
b)
1 in 4
c)
2 in 4
d)
4 in 4
22.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
23.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
24.
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
25.
If the dominant allele (B) represents brown hair and the recessive allele (b) represents blonde hair, which offspring represents a homozygous recessive genotype?
a)
BB
b)
Bb
c)
blonde
d)
bb
26.
The inheritance pattern that allows are only one trait to show is called _______________ _______________.
a)
complete dominance
b)
co-dominance
c)
incomplete dominance
d)
dominant trait
27.
Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.
a)
DNA
b)
protein
c)
RNA
d)
glucose nucleic acid (GNA)
28.
In Mendel's P generation, a true-breeding tall plant was crossed with a true-breeding short plant. Short plants reappeared in the F2 generation because
a)
the allele for tallness is dominant
b)
they inherited an allele for shortness and tallness from each parent
c)
the allele for shortness is recessive
d)
the allele for shortness and the allele for tallness segregated when the F1 plants made gametes
29.
Punnett squares show all of the following except
a)
the actual results of a cross
b)
all possible genotypes of the offspring
c)
the alleles in the gametes of each parent
d)
all possible phenotypes of the offspring
30.
Freckles (F) are dominant over nonfreckles. What is the phenotype of individual #3
a)
Ff
b)
ff
c)
freckles
d)
nonfreckles
31.
Snap dragon color is a incomplete dominant trait. A red flower (RR) is crossed with white flower (rr)? What color are flowers that are Rr?
a)
Red
b)
Red and White
c)
White
d)
Pink
32.
Two heterozygous parents produce offspring. What is the probability of the HETEROZYGOUS GENOTYPE appearing in the offspring generation?
a)
75%
b)
25%
c)
50%
d)
100%
33.
Two heterozygous parents produce offspring. What is the probability of the HOMOZYGOUS DOMINANT GENOTYPE appearing in the offspring generation?
a)
75%
b)
25%
c)
50%
d)
100%
34.
A ________________________ is a tool used to predict the possible genotype from certain parents
a)
Mendel Grid
b)
Genetic Tic Tac Toe
c)
Punnett Square
d)
Pedigree Plot
35.
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%
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.
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
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