WorksheetsGenetics Test Review
Total questions: 70
Worksheet time: 6hrs 50mins
Hybrid is the same as which genotype(s)?
DD
Dd
dd
Which genotype is Homozygous Dominant?
dd
DD
Dd
Which genotype(s) would show the recessive phenotype?
DD
Dd
dd
Having dimples is a dominant trait. Which genotype(s) would show the dominant phenotype of having dimples?
DD
dd
Dd
Purebred is the same as _____________.
Homozygous
Heterozygous
Hybrid
in dogs, curly fur is more common than straight fur
in dogs, curly fur is an acquired trait
the mother dog acquired curly fur and passed on that trait to her puppy
the mother dog inherited curly fur and passed on that trait to her puppy
a characteristic that a living thing gets from its parents
a characteristic that a living thing gets during its lifetime
a behavior that a living thing learns from its parents
a skill that an animal develops after it is born
B = brown eyes
b = blue eyes
What is true about two brothers that have brown eyes? One has genotype BB the other Bb.
they have same phenotype and genotype
they have different genotypes and phenotypes
they have same phenotype but different genotypes
they have same genotype but different phenotypes
H = white hair
h = non-white hair
If you cross a horse with HH and a horse with hh, what percent of the offspring would be expected to have white hair?
0%
75%
50%
100%
Pea plants can have green or yellow seeds. In a pea plant that is heterozygous for seed color, the allele for yellow seeds masks the effects of the allele of green seeds. Which of the following terms best describes the allele for yellow seeds?
codominant
recessive
dominant
sex-linked
In guinea pigs, black hair (B) is dominant over brown hair (b). Two black-haired guinea pigs are crossed. One of the pigs is homozygous for black hair and one is heterozygous. What percentage of their offspring are expected to have black hair?
25%
50%
75%
100%
they eat same foods
they have half of each parent's DNA
they speak the same language
they have the same interests
Two heterozygous (Tt) tall pea plants are crossed. Which describes phenotype probabilities in their offspring?
50% chance they will be tall and 50% change they will be short
75% chance they will be tall and 25% chance they will be short
100% chance they will be short
R = round seed
r = wrinkled seed.
Cross a homozygous round seed with a wrinkled seed. Which statement predicts the results?
offspring will be Rr
offspring will be RR
round seeds will be recessive to wrinkled
Wrinkled will be observed in half of offspring
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
100% BB
75% BB and 25% Bb
50% BB and 50% Bb
50% Bb and 50% bb
Squidward has light blue skin, and his genotype for this trait is Bb. Which of the following would describe Squidward?
Purebred
Hybrid
Homozygous
Sex-linked
Which of the following are examples of phenotypes?
Red flower petals
Bb
bb
Blue eyes
having two of the same genes for the trait.
homozygous
hetrozygous
protein
chromosome
Which term means having two different alleles for a trait?
protein
homozygous
heterozygous
genotype
Two heterozygous brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
0 %
25%
50%
75%
The genotype for a yellow plant is...
Where are chromosomes found in a cell?
In the neutron of the cell.
In the nucleus of the cell.
In the proton of the cell.
In the cell membrane of the cell.
Genetic makeup for a black cat that is homozygous dominant?
BB
Bb
bb
Genetic makeup of a white cat that is homozygous recessive?
BB
Bb
bb
Genetic makeup of a black cat that is heterozygous?
BB
Bb
bb
One parent has brown eyes (Bb) and the other parent has blue eyes (bb). What's the probability of the child having brown eyes?
25%
75%
50%
100%
One parent carries the purebred, curly hair trait (dominant trait). The other parent carries the purebred, straight hair trait. What's the probability the child will have curly hair?
100%
25%
75%
50%
If the genetic makeup (genotype) is heterozygous, which trait will always be expressed?
Dominant
Recessive
In cats, the gene for long tails is dominant over the gene for short tails. What trait will be expressed if the cat is heterozygous?
long tail
short tail
A punnett square shows us __________
only the dominant offspring from parents
the probabilities of combinations in the offspring of 2 parents.
only the recessive offspring from parents
Phenotypes are ______________
dominant
the genetic makeup based on the traits
recessive
physical expressions of genetic traits
Which statement below is TRUE?
Traits control genes (phenotypes control genotypes)
Genes control traits (genotypes control phenotypes)
Alleles are ____________
homozygous
proteins
different forms of a gene
the same as chromosomes
An organism's genotype is its ___________
physical expression of inherited traits
genetic makeup based off inherited alleles
instructions for inherited traits
The passing of traits from parents to offspring is called ___________.
genetics
inheritance
genotype
heredity
Which is the smallest?
gene
cell
chromosome
Which is largest?
gene
cell
chromosome
When looking at a cell, where would you find the genes?
nucleus
cytoplasm
mitochondria
cell membrane
If both parents are heterozygous, what is the probability an offspring will show the recessive trait?
25%
50%
75%
100%
Brown hair is dominant over blonde hair. If one brown hair parent and one blonde hair parent have a child with blonde hair, what is the genetic makeup of the brown hair parent?
BB
bb
Bb
In asexual reproduction, all of the offspring are:
Physically Identical
Genetically Identical
Physically and Genetically Identical
Not Identical
How many parent(s) are needed for asexual reproduction?
4
1
9
2
What are some of the facts about asexual reproduction?
Takes only one mate to reproduce and takes a longer time to reproduce
Takes a shorter amount of time to reproduce and it takes two mates to reproduce
Reproduces diverse offspring and takes a longer time to reproduce
Takes only one parent to reproduce and takes a shorter time to reproduce
How many parents does sexual reproduction involve?
one
two
three
four
The offspring from asexually reproduced organisms are?
Different than their parents
Identical to parents
Like a combination from both parents
A different species
If two organisms reproduce sexually, then their offspring will exhibit a genetic makeup that is ______.
identical to only one parent
identical to all of its siblings
a unique combination of traits
the recessive traits of each parent
All of the offspring of an organism have the same genetic material, which is identical to the parent organism. We can conclude that this organism ______.
makes its own food
is unicellular
live in a marine habitat
reproduces asexually
A labradoodle is a type of dog that is crossed between a labradoor retriever and a poodle. The labradoodle puppy takes on the traits of both of its parents. Female dogs have a pregnancy period of almost 70 days.
Sexual reproduction with identical offspring
Asexual reproduction with diverse offspring
Sexual reproduction with diverse offspring
Asexual reproduction with identical offspring
Selective breeding is where ___________ decides which traits should be passed on
Nature
Humans
The overall function of selective breeding is to
Create organisms with desirable traits
Create bigger organisms
Create animals with more genetic mutations
A farmer has bred his pineapple plants from the sweetest pineapples from his last harvest to get even sweeter pineapple plants. What is this an example of?
Selective breeding
Natural selection
Another name for Selective Breeding is
Evolution
Natural Selection
Extinction
Artificial Selection
Problems with animals that are selectively bred include:
Being more disease resistant
Producing more meat
Being more likely to suffer from genetic disease
Being more genetically diverse
To breed a cow that produces a lot of milk a farmer would breed:
Two cows that produce a lot of milk
A cow and a bull that produce a lot of milk
A cow who produces a lot of milk and a bull who's mother produced a lot of milk
The biggest cow and the biggest bull
What is a phenotype?
2 alleles
Genetic code represented by letter
Measurement of productivity due to genetics
Observable physical characterisitcs
"Variety of traits" and "genetic variation" describe what type of reproduction?
Sexual
Asexual
Pollen from one plant fertilizes another plant. What kind of reproduction is this?
Sexual
Asexual
If I cross two of my favorite plants that have different traits, what is this called?
inheritance
selective breeding
gene therapy
What is a disadvantage of future generations of purebred animals?
They can continue to inherit traits that are negative to their health.
They might become aggressive to dogs that look different.
They may be unable to breed.
Their litters may become very small.
If I want to create the fastest race horse, what should I look for?
Can I train a horse to become the fastest?
What is the strongest horse breed?
Is it safe to race horses?
Is there a "speed gene"?
