NEW
Font size
S
M
L
XL
WorksheetsPunnett Squares and Genetics
Total questions: 36
Worksheet time: 2hrs 40mins
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.
Aa is
a)
homozygous (purebred)
b)
heterozygous (hybrid)
7.
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
8.
Evan is a tall, 12 year old boy. He has a scar on his right cheek. He is intelligent and an excellent drummer. Which of his traits did he most likely inherit?
a)
height
b)
the scar
c)
his intelligence
d)
ability to play drums
9.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
10.
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
11.
T = tall an 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)
medium sized
d)
neither tall or short
12.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
13.
Who is considered the "father of genetics"?
a)
Gregor Mendel
b)
Reginald Punnett
c)
James Watson
d)
Justin Bieber
14.
The scientific study of heredity is ____.
a)
Genetics
b)
Punnett squares
c)
Inheritance
d)
Biology
15.
Some traits are inherited, some traits are acquired.
tongue rolling is
tongue rolling is
a)
inherited trait
b)
acquired trait
16.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
17.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
18.
Having two of the same genes for the trait (TT, tt); Both dominant or both recessive.
a)
homozygous or purebred
b)
heterozygous or hybrid
c)
twin offspring
d)
pairs of chromosomes
19.
Having two of the same genes for the trait (TT, tt); Both dominant or both recessive.
a)
homozygous or purebred
b)
heterozygous or hybrid
c)
twin offspring
d)
pairs of chromosomes
20.
____ occurs when pollen is transferred from the anther of the flower to the stigma.
a)
Pollination
b)
Appearance
c)
Control
d)
Multiplication
21.
Some plants may be able to self- or cross-pollinate.
a)
True
b)
False
22.
What are the three generations that were established by Mendel?
a)
P, M, C
b)
1, 2, 3
c)
A, B1, B2
d)
P, F1, F2
23.
____ is the likelihood that a specific event will occur.
a)
Cross
b)
Probability
c)
Ratio
d)
Independent assortment
24.
A dihybrid cross involves only one trait.
a)
True
b)
False
25.
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
26.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
27.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
28.
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
29.
aa always shows up as
a)
dominant
b)
recessive
30.
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
31.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
32.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
33.
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
34.
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
35.
___ occurs when both alleles for a gene are expressed in a heterozygous offspring.
a)
Dominance
b)
Codominance
c)
Complete dominance
d)
Incomplete dominance
36.
___ is where two or more alleles influence the phenotype.
a)
Dominance
b)
Codominance
c)
Complete dominance
d)
Incomplete dominance
Reset
