WorksheetsGenetics Review (for the TEST)
Total questions: 45
Worksheet time: 54mins
Name
Class
Date
1.
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
2.
Dominant alleles are represented by a
a)
male gene.
b)
lower-case letter.
c)
recessive trait.
d)
capital letter.
3.
Two brown eyed parents (Bb) have a baby.
What is the chance the baby will have blue eyes?
What is the chance the baby will have blue eyes?
a)
0 %
b)
25%
c)
50%
d)
75%
4.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous genes
d)
mutated DNA
5.
Organisms that are considered index fossils lived for a relatively short amount of time, which enables geologists to figure out the relative age of a rock layer.
Why do you think these organisms had such a brief time on Earth?
Why do you think these organisms had such a brief time on Earth?
a)
the organisms weren't able to adapt to a changing environment
b)
the organisms lacked genetic diversity to adapt
c)
the organisms were not able to compete with other organisms
d)
all answers for this question are possible
6.
A dog gives birth to 5 puppies.
What percentage of the chromosomes does each puppy share with the mother?
What percentage of the chromosomes does each puppy share with the mother?
a)
25%
b)
50%
c)
75%
d)
100%
7.
Where is DNA located in a eukaryotic cell?
a)
cytoplasm
b)
cell membrane
c)
nucleus
d)
vacuole
8.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
9.
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
10.
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
11.
What is the passing of genetic traits from parent to offspring?
a)
heredity
b)
trait
c)
gene
d)
allele
12.
What gender has an X and a Y chromosome?
a)
male
b)
female
c)
transgender
d)
all of the above
13.
What is the cause of some traits "skipping" a generation?
a)
dominant traits
b)
recessive traits
c)
mutations
d)
natural selection
14.
The scientific study of heredity is ____.
a)
genetics
b)
punnett squares
c)
inheritance
d)
biology
15.
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.
16.
The image you see is a mammoth. Which trait most suggests that the mammoth was adapted to live in a cold climate?
a)
its thick, furry coat
b)
its long, flexible trunk
c)
its sharp, curved tusks
d)
its broad, powerful body
17.
Which of the following statements best describes how adaptations benefit an organism?
a)
it guarantees that the organism will survive
b)
it increases an organism's chances of survival
c)
it guarantees that an organism will have a stout beak
d)
it increases an organism's chance of becoming extinct
18.
What are natural differences in an inherited trait?
a)
asexual
b)
uniform
c)
variation
d)
overproduction
19.
When all members of a species have died...
a)
extinction
b)
evolution
c)
mutation
d)
variation
20.
What is a new organism (seed, puppy, spore, kitten) produced by reproduction of a living thing?
a)
theory
b)
diversity
c)
offspring
d)
species
21.
What is the concept where organisms that are better adapted (more fit) to their environment to survive and reproduce more successfully than organisms that are less adapted to their environment?
a)
extinction
b)
artificial selection
c)
variation
d)
natural selection
22.
Which of the following is the theory by which populations change over time?
a)
extinction
b)
evolution
c)
population
d)
mutation
23.
What is 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
24.
Chickens can have white feathers, black feathers or an erminette color (blend of black and white feathers).
What inheritance pattern is this?
What inheritance pattern is this?
a)
co-dominance
b)
incomplete dominance
c)
multiple alleles
d)
law of dominance
25.
Why is DNA important?
a)
it is very small and very complicated
b)
it's in everything
c)
it serves as the blueprint for traits of all living things
d)
because we eat it every day for energy
26.
Two brown eyed parents (Bb) have a baby.
What is the chance the baby is blue eyed?
What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
27.
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
28.
Study the image.
What type of inheritance pattern shows BOTH traits in possible offspring?
What type of inheritance pattern shows BOTH traits in possible offspring?
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
29.
Study the image.
What is this type of inheritance pattern (when there is a MIXTURE or BLEND of two traits from the parents)?
What is this type of inheritance pattern (when there is a MIXTURE or BLEND of two traits from the parents)?
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
30.
Who is known as the father of modern day genetics?
a)
Albert Einstein
b)
Isaac Newton
c)
Gregor Mendel
d)
Charles Darwin
31.
Which of the following is a single piece of coiled DNA found in the cells that contains genes that encode traits?
a)
gene
b)
chromosome
c)
trait
d)
DNA
32.
What percentage of each genotype results from this genetic cross?
a)
25% blue eyes
75% brown eyes
75% brown eyes
b)
BB = 25%
Bb = 50%
bb = 25%
Bb = 50%
bb = 25%
c)
BB= 50%
bb = 50%
bb = 50%
d)
All brown eyes
33.
What 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
34.
Two heterozygous parents produce offspring. What is the probability of the HOMOZYGOUS DOMINANT GENOTYPE appearing in the F1 generation?
a)
75%
b)
25%
c)
50%
d)
100%
35.
A calico cat shows both the traits for orange fur and black fur.
What kind of allele expression is this?
What kind of allele expression is this?
a)
incomplete dominance
b)
co-dominance
c)
independent assortment
d)
recessive inheritance
36.
Study the image.
Freckles (F) are dominant over no freckles.
What is the phenotype of individual #3?
Freckles (F) are dominant over no freckles.
What is the phenotype of individual #3?
a)
Ff
b)
ff
c)
freckles
d)
no freckles
37.
Mutations are changes in the _____________.
a)
genes or DNA
b)
RNA and DNA
38.
One of a number of different forms of a gene...
a)
gene
b)
gamete
c)
fertilization
d)
allele
39.
Which law of genetics states that alleles are seperated?
a)
Law of Independent Assortment
b)
Law of Segregation
c)
Law of Mendel
d)
Law of Separation
40.
What is the Punnett square used to predict?
a)
possible genotypes for the cross
b)
which traits are dominant
c)
which traits are recessive
d)
the number of offspring
41.
Which cellular process is shown?
a)
meiosis
b)
endocytosis
c)
mitosis
d)
phagocytosis
42.
What is one advantage of sexual reproduction?
a)
offspring are identical to parents
b)
offspring are resistant to viruses
c)
offspring are born live, rather than from eggs
d)
offspring inherit a wider variety of genetic information
43.
How many times in meiosis does the cell divided?
a)
2
b)
4
c)
3
d)
1
44.
Your eye color has nothing to do with whether you have a "hitchhikers" thumb.
What principle explains this example?
What principle explains this example?
a)
law of segregation
b)
both of Mendel's laws
c)
neither of Mendel's laws
d)
law of independent assortment
45.
What is a cell function of "cloning" cells for healing and growth?
a)
mitosis
b)
meiosis
c)
mitochondria
d)
deoxyribonucleic acid
100 %
