NEW
Font size
S
M
L
XL
WorksheetsIntro to Genetics
Total questions: 80
Worksheet time: 2hrs 33mins
Name
Class
Date
1.
Dominant or recessive?
tt
tt
a)
Dominant
b)
Recessive
2.
Dominant or recessive?
Dd
Dd
a)
Dominant
b)
recessive
c)
neither
d)
homozygous
3.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
4.
one of the alternative forms of a gene that governs a characteristic, such as hair color
a)
allele
b)
gene
c)
trait
d)
DNA
5.
an organism's appearance or other detectable characteristic
a)
genotype
b)
phenotype
c)
genetics
d)
heterozygous
6.
You get your genes from:
a)
Department Store
b)
Parents
c)
Aunt
d)
Neighbor
7.
The physical appearance of a gene:
a)
Genotype
b)
Heredity
c)
Phenotype
d)
Allele
8.
Homozygous or heterozygous?
BB
BB
a)
Homozygous
b)
Heterozygous
9.
Which of the following pairs is homozygous dominant?
a)
Hh
b)
pp
c)
HH
d)
aa
10.
Which of the following is heterozygous?
a)
Hh
b)
gg
c)
HH
d)
GG
11.
Jackie is homozygous recessive for having dimples (D). What is her genotype?
a)
pp
b)
Dd
c)
dd
d)
DD
12.
a segment of DNA on a chromosome which codes for a specific trait
a)
heredity
b)
allele
c)
trait
d)
gene
13.
Dominant or recessive?
Dd
Dd
a)
Dominant
b)
recessive
c)
neither
d)
homozygous
14.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
15.
He is known as the father of modern day genetics.
a)
Gregory Mendel
b)
Greg Mendel
c)
Gregor Mendel
d)
Grace Mendel
16.
Which of the following alleles is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
17.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
18.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
19.
AA and Aa always show up as
a)
dominant
b)
recessive
20.
aa always shows up as
a)
dominant
b)
recessive
21.
Aa is
a)
homozygous
b)
heterozygous
22.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
hybrid
d)
genotype
23.
Heredity is the passing of traits from _____________________ to _____________________
a)
predators to prey
b)
water to rain
c)
parents to offspring
d)
fungi to protists
24.
___________________________ is the study of how traits are passed on, or inherited.
a)
dominant traits
b)
ratio
c)
phenotype
d)
genetics
25.
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
26.
True or False: Recessive traits are ALWAYS present
a)
True
b)
False
27.
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
28.
______________________ is the mathematical chance that something will happen
a)
division
b)
selective breeding
c)
ratio
d)
probability
29.
_____________________ are cells that join to make offspring
a)
speed cells
b)
sex cells
c)
pea cells
d)
pedigree cells
30.
Bunny A’s fur is all brown, while his brother and sisters are brown and white spotted. The bunnies’ father is all brown, and the mother bunny is spotted brown and white. Which best describes this type of inheritance?
a)
The alleles are codominant.
b)
The alleles display incomplete dominance.
c)
This is a sex-linked trait.
d)
This is an example of multiple alleles.
31.
Which characteristic would a child not inherit from one or both of its parents?
a)
freckles
b)
hair style
c)
eye color
d)
dimples
32.
Which statement best supports why many offspring look similar to their parents?
a)
Offspring inherit characteristics from one parent.
b)
Offspring inherit characteristics from both parents.
c)
Parents choose which characteristics to pass on to their offspring.
d)
Parents choose to change their appearance to match that of their offspring.
33.
Which feature of a bird is controlled only by inherited genes?
a)
diet
b)
habitat
c)
beak shape
d)
life span
34.
Which is an example of an acquired characteristic?
a)
color of a dog’s fur
b)
color blindness of a person
c)
ability of a mouse to run a maze
d)
a person’s ability to roll their tongue
35.
What is a gene?
a)
An entire chromosome that codes for a trait
b)
a piece of clothing
c)
a piece of a DNA on chromosome that codes for a trait
d)
Chemical messengers in your brain that code for a trait
36.
The mathematical chance that something will happen is known as...
a)
chance
b)
luck
c)
probability
37.
What are the possible combinations of a pea plant with the alleles PP and a male pea plant with the alleles pp.
P= purple
p= white
P= purple
p= white
a)
all Pp
b)
all PP
c)
Pp,PP,Pp,PP
d)
all pp
38.
A couple has 6 children, all girls. If the mother gives birth to a 7th child, what is the probability that the seventh child will be a girl?
a)
7 out of 7
b)
6 out of 7
c)
1 out of 2
d)
1 out of 7
39.
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
40.
T = tall and t = short
TT and Tt would result in the following phenotype
a)
short
b)
tall
c)
both tall and short
d)
neither tall or short
41.
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%
42.
How many are tall?
a)
0
b)
1
c)
2
d)
4
43.
The different forms of genes are known as...
a)
traits.
b)
environment.
c)
probability.
d)
alleles.
44.
In dragons, scale color shows incomplete dominance. If a red (RR) dragon mates with a white (rr) dragon, what percentage of their offspring could be pink?
a)
100%
b)
75%
c)
50%
d)
0%
45.
In fruit flies, eye color is a sex-linked trait. If a male with red (R) eyes mates with a white-eyed (r) female, what percentage of their children will be white-eyed males?
a)
100%
b)
50%
c)
25%
d)
0%
46.
Purebred is another word for __________, while hybrid is another word for __________.
a)
dominant; recessive
b)
recessive; dominant
c)
homozygous; heterozygous
d)
heterozygous; homozygous
47.
What percentage of the offspring will have this recessive disease?
a)
0%
b)
25%
c)
50%
d)
75%
48.
What percentage of the female offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
49.
How many PAIRS of chromosomes do humans have?
a)
23
b)
46
c)
1
d)
2
50.
I have 2 X chromosomes. What am I?
a)
Male
b)
Female
51.
I have 1 X chromosome and 1 Y chromosome. What am I?
a)
Male
b)
Female
52.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be what?
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
53.
Males are more likely to suffer from a sex-linked disease or disorder because
a)
males are the weaker sex
b)
males have less DNA
c)
males have 1 X chromosome, so the disorder is more likely to be expressed
54.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?
Which genotype represents a female who is a carrier for hemophilia?
a)
XHXh
b)
XhXh
c)
XHXH
d)
XhY
55.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?
Which genotype represents a male with hemophilia?
a)
XHXh
b)
XhXh
c)
XHY
d)
XhY
56.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-Dominance
57.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
58.
This is an example of ___________.
a)
Incomplete Dominance
b)
Codominance
59.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
60.
If you cross a black chicken with a white chicken, only checkered chickens would be produced. What kind of inheritance pattern does this follow?
a)
incomplete Dominance
b)
Co-Dominance
61.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
62.
The different forms of a gene are called
a)
traits
b)
pollinators
c)
alleles
d)
hybrids
63.
If you cross a red snapdragon with a white snapdragon, only pink snapdragons will be produced. What type of inheritance pattern does this follow?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Co-Dominance
d)
Sex-linked
64.
This shows...
a)
Incomplete dominance
b)
Codominance
c)
Sex linked traits
d)
Dominant inheritance
65.
What gamete possibilities could come from this parent's genotype?
a)
AB, AB, aB, aB
b)
Ab, AB, Ab, ab
c)
Ab, Ab, Ab, Ab
d)
AB, aB, ab, aB
66.
What goes in box 1
a)
AABb
b)
AABB
c)
aabb
d)
AaBb
67.
Based off this punnett square, what fraction of the offspring will have wrinkled, yellow seeds?
a)
9/16
b)
3/16
c)
1/16
d)
16/16
68.
How many letters would go above each box 1, 2, 3, and 4?
a)
1 letter (ie. A)
b)
2 different letter (i.e. AB)
69.
In the punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
70.
What are the possible genotypes for this cross?
(Click the picture to see it without the text)
(Click the picture to see it without the text)
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
71.
A personal with type AB blood has which genotype?
a)
type A
b)
AA
c)
IAIA
d)
IAIB
72.
A yellow pea pod is crossed with a green pea pod. Give the phenotype of each offspring.
a)
25% green, 50% yellow
b)
75% yellow, 25% green
c)
50% yellow, 50% green
d)
100% green
73.
What blood types would the children of a homozygous type A mother and a heterozygous type B father have? List all the possible phenotypes!
a)
50% AB, 50% A
b)
50% A, 50% B
c)
50% B, 50% AB
d)
50% O, 50% A
74.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
75.
Hemophilia is a sex-linked recessive trait. Perform a cross between a normal male and a hemophiliac mother. What is the probability of the male offspring having hemophilia
a)
0%
b)
50%
c)
100%
d)
75%
76.
A woman with A blood has a child with B blood. What would the genotypes of the parents have to be to produce a child with O blood?
a)
IAi & IBi
b)
IAIA & IBi
c)
IAIA & IBIB
d)
None of the above - it would be impossible to have a child with O blood
77.
Mendel's P generation consisted of
a)
two purebred parents
b)
one purebred and one hybrid parent
c)
two hybrid parents
d)
one homozygous and one heterozygous parent
78.
Mendel's F1 generation consisted of
a)
50% homozygous and 50% heterozygous
b)
100% homozygous
c)
25% homozygous and 75% heterozygous
d)
100% heterozygous
79.
Mendel's F2 generation consisted of
a)
100% showing the dominant trait
b)
50% showing the dominant trait and 50% showing the recessive trait
c)
25% showing the dominant trait and 75% showing the recessive trait
d)
75% showing the dominant trait and 25% showing the recessive trait
80.
Which pattern of complex inheritance results in a wide range of phenotypes?
a)
polygenic traits
b)
sex-linked traits
c)
codomince
d)
multiple alleles
Reset
