WorksheetsPunnett Squares
Total questions: 50
Worksheet time: 12mins
Name
Class
Date
1.
The genotypic ratio here is
a)
25% blue eye 75 % brown eye
b)
BB = 25% Bb = 50% bb = 25%
c)
BB= 50 % bb = 50%
d)
All brown eye
2.
The dominant trait is
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
3.
To be a yellow seed genotype must be
a)
aa
b)
Aa
c)
AA
d)
AA or Aa
4.
What is the genotypic ratio here
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
5.
Heredity is the passing of traits from _____________________ to _____________________
a)
predators to prey
b)
water to rain
c)
parents to offspring
d)
fungi to protists
6.
___________________________ is the study of how traits are passed on, or inherited.
a)
dominant traits
b)
ratio
c)
phenotype
d)
genetics
7.
Why did Mendel choose to study pea plants in order to learn how traits are passed from parent to offspring?
a)
Pea plants grow quickly
b)
Pea plants are ultraviolet
c)
Pea plants are rare and expensive
d)
Pea plants are take years to grow
8.
One trait that is ALWAYS present and causes the other traits to disappear is a ________________________
a)
recessive trait
b)
aggressive trait
c)
absent trait
d)
dominant trait
9.
One trait that is ALWAYS present and causes the other traits to disappear is a ________________________
a)
recessive trait
b)
aggressive trait
c)
absent trait
d)
dominant trait
10.
Offspring receives two sets of _____________ (one from each parent)
a)
blue jeans
b)
genes
c)
machines
d)
pedigree
11.
_____________________ is the appearance of an organism, or how it looks
a)
phenotype
b)
ratio
c)
recessive trait
d)
heredity
12.
A ________________________ is used to predict the possible genotype from certain parents
a)
Mendel Grid
b)
Genetic Tic Tac Toe
c)
Punnett Square
d)
Pedigree Plot
13.
_____________________ are cells that join to make offspring
a)
speed cells
b)
sex cells
c)
pea cells
d)
pedigree cells
14.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
15.
A characteristic that an organism can pass on to its offspring through its genes
a)
protein
b)
trait
c)
DNA
d)
gene
16.
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)
17.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
18.
father of genetics
a)
Gregor Mendel
b)
James Watson
c)
Dr. Robbins
d)
Francis Crick
19.
What is an organisms appearance called?
a)
phenotype
b)
genotype
c)
dominant
d)
recessive
20.
What is the process that produces cells with half the usual number of chromosomes
a)
mitosis
b)
meiosis
c)
trait
d)
reproduction
21.
The genetic combination of alleles is called the
a)
genotype
b)
phenotype
c)
heterozygous
d)
homozygous
22.
A matching pair of alleles are called
a)
dominant
b)
recessive
c)
heterozygous
d)
homozygous
23.
A mismatched pair of alleles is called
a)
dominant
b)
recessive
c)
heterozygous
d)
homozygous
24.
Sperm and eggs are known as
a)
sex cells
b)
sex chromosomes
c)
sex genes
d)
true-breeding factors
25.
Humans produce sex cells through a process called
a)
mitosis
b)
cytokinesis
c)
meiosis
d)
binary fission
26.
Process in sexual reproduction in which male and female reproductive cells join to form a new cell.
a)
gene
b)
gamete
c)
fertilization
d)
allele
27.
One of a number of different forms of a gene.
a)
gene
b)
gamete
c)
fertilization
d)
allele
28.
The physical appearance of the organism is known as the
a)
Phenotype
b)
Chromosome
c)
Nucleictype
d)
Genotype
29.
What is an organism's genetic makeup known as?
a)
Phenotype
b)
Chromosome
c)
DNA
d)
Genotype
30.
When both alleles of a pair are alike, the organism is said to be
a)
Homozygous
b)
Heterozygous
c)
Homologous
d)
Heterologous
31.
What would the genotypes be?
a)
TT, TT, Tt, Tt
b)
TT, Tt, Tt, tt
c)
Tt, Tt, tt, tt
d)
None of the above
32.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
33.
If T=Tall & t=short, what is the phenotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
34.
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%
35.
A corn plant heterozygous for tall sprouts mates with a corn plant with short sprouts. If tall sprouts are dominant, how many different phenotypes are possible in the offspring?
a)
1
b)
2
c)
3
d)
4
36.
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%
37.
Snapdragon flowers come in red, pink and white. What type of inheritance is this?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Codominance
d)
Polygenic Inheritance
38.
How many pairs of chromosomes are in your cells?
a)
23
b)
19
c)
12
d)
10
39.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
40.
Which of the following alleles is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
41.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
42.
Which of the following cell types is formed by meiosis?
a)
muscle cells
b)
skin cells
c)
sperm cells
d)
blood cells
43.
Polygenic means that _____________________ control a characteristic
a)
many genes
b)
single genes
c)
3 genes
d)
no genes
44.
Polygenic means that _____________________ control a characteristic
a)
many genes
b)
single genes
c)
3 genes
d)
no genes
45.
Red/green color blindness is a recessive trait. A woman who is a carrier for this allele marries a normal-vision male. What is the probability that they will have a child who is color blind?
a)
1/4
b)
1/2
c)
3/4
d)
1
46.
An allele whose trait always shows up in the organism when the allele is present.
a)
recessive allele
b)
dominant allele
c)
hidden allele
d)
present allele
47.
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
48.
What type of gene can hide the effects of a recessive gene?
a)
inherited trait
b)
learned trait
c)
dominant gene
d)
recessive gene
49.
To be a yellow seed genotype must be
a)
aa
b)
Aa
c)
AA
d)
AA or Aa
50.
A Punnet Square will
a)
tell you exactly what your offspring will look like
b)
increase the chance you pass on recessive traits
c)
predict genotypes and phenotypes in offspring
d)
have no purpose but for Taylor to give us extra assignments
100 %
