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WorksheetsHeredity Quizizz
Total questions: 45
Worksheet time: 23mins
What did Gregor Mendel do to study different characteristics in his genetics experiments?
He studied only asexual plants.
He studied only tall and short pea plants.
He cross-pollinated plants.
He cross-pollinated both plants and animals.
What does the notation TT mean to geneticists?
two dominant alleles
heterozygous alleles
at least one dominant allele
one dominant and one recessive allele
What is the probability of producing a tall pea plant from a genetic cross between two hybrid tall pea plants?
one in four
two in four
three in four
four in four
What does a Punnett square show?
all the possible outcomes of a genetic cross
only the dominant alleles in a genetic cross
only the recessive alleles in a genetic cross
all of Mendel’s discoveries about genetic crosses
A purebred chicken with white feathers is crossed with a purebred chicken that has black feathers. Each of their offspring has both black and white feathers. Why does this happen?
Both alleles for feather color are dominant.
Both alleles for feather color are recessive.
The alleles for feather color are neither dominant nor recessive.
Several alleles work together to determine the trait.
What happens during meiosis?
Two sex cells combine.
Chromosome pairs separate and are distributed into new sex cells.
Each sex cell copies itself to form four new chromosomes.
Chromosome pairs remain together when new sex cells are formed.
Which term refers to physical characteristics that are studied in genetics?
traits
offspring
generations
hybrids
An organism’s genotype is its
genetic makeup.
feather color.
physical appearance.
stem height.
Which of the following traits is influenced by both inheritance and environmental factors?
the ability to sing well
the ability to cough
natural hair color
dyed hair color
If a homozygous black guinea pig (BB) is crossed with a homozygous white guinea pig (bb), what is the probability that an offspring will have black fur?
25 percent
50 percent
75 percent
100 percent
An organism’s physical appearance is its
genotype
phenotype
dominance
allele
When sex cells combine to produce offspring, each sex cell will contribute
one fourth the number of chromosomes in body cells.
half the number of chromosomes in body cells.
the normal number of chromosomes in body cells.
twice the number of chromosomes in body cells.
The different forms of a gene are called
alleles.
factors.
masks.
traits.
A heterozygous organism has
three different alleles for a trait.
two identical alleles for a trait.
only one allele for a trait.
two different alleles for a trait.
Chromosomes are made up of
one pair of alleles.
a phenotype and a genotype.
male and female sex cells.
many genes joined together.
Which combination of sex chromosomes results in a male human being?
XX
YY
XY
either XX or YY
How does a geneticist use pedigrees?
to create genetic crosses
to replicate identical strings of DNA
to prove that sex-linked traits are caused by codominant alleles
to trace the inheritance of traits in humans
Cloning results in two organisms that are
both adult mammals.
produced from cuttings.
genetically similar.
genetically identical.
What is a pedigree?
a chart that tracks which members of a family have a particular trait
a geneticist who studies the inheritance of traits in humans
a picture of all of the chromosomes in a cell
an allele passed from parent to child on a sex chromosome
A farmer is hoping to have a herd of cows that can produce more milk. He chooses cows in his herd that produce the most milk and only lets these cows reproduce. This is an example of:
genetic engineering.
inbreeding.
selective breeding.
cloning.
Down syndrome most often occurs when
a person inherits a recessive allele.
chromosomes fail to separate properly during meiosis.
sickle-shaped cells become stuck in blood vessels.
blood fails to clot properly.
What genetic disorder results in abnormally shaped blood cells?
hemophilia
Down syndrome
cystic fibrosis
sickle-cell disease
What is the function of DNA in a cell?
Regulating the movement of nutrients.
Storing and releasing chemicals.
Carrying genetic material.
Providing energy for activities.
In living things, traits are passed on from one generation to the next by the transfer of
minerals
blood
calories
DNA
What condition is the result of abnormal cell division?
cancer
pregnancy
infection
meiosis
Which process gives rise to a variety of traits within a species?
Sexual reproduction
Asexual reproduction
Respiration
Photosynthesis
In multicellular organisms, cell division is required for growth and
repair
locomotion
respiration
circulation
What conclusion can be made from these diagrams?
plant and animal cells interact to make new organisms.
plant and animal cells are similar in that they grow and divide.
animal cells require oxygen to release the energy stored in food while plants do not.
nerve cells are present in plant and animal cells.
*In sexual reproduction, what fraction of genes does each parent contribute to the offspring?
1
1/4
1/3
1/2
How many males in this model show the trait?
one
three
four
seven
In mitosis, daughter cells have
the same number of chromosomes as parent cell.
half the number of chromosomes as the parent cell.
double the number of chromosomes as the parent cell.
none of the chromosomes from the parent cell.
In meiosis, daughter cells have
the same number of chromosomes as parent cell.
half the number of chromosomes as the parent cell.
double the number of chromosomes as the parent cell.
none of the chromosomes from the parent cell.
Cell theory states that
cells are prokaryotic or eukaryotic
cells come from pre-existing, living cells.
all matter (“stuff”) is made of cells.
cells can come from non-living things.
The transfer of DNA from one organism into the DNA of another organism by scientists is called
selective breeding
genetic engineering
natural selection
internal fertilization
Each female human's egg should have
one X chromosome
two sex chromosomes
one Y chromosome
X or Y chromosomes
The Punnett square represents a cross between two parent pea plants. The gene for round shape (R) is dominant over the gene for wrinkled shape (r). What percentage of offspring will have wrinkled shape?
25%
50%
0%
100%
Complete the Punnett square below to show the probably of the results of crossing two Rr parents. Which lists ALL possible genotypes?
RR and Rr
RR, Rr, and rr
Rr and rr
rr and RR
Does the diagram show sexual reproduction or asexual reproduction?
Sexual Reproduction
Asexual Reproduction
In rabbits, the gene for brown fur (B) is dominant over white fur (b). What is the genetic makeup of two parent rabbits whose offspring will only have white fur?
BB x Bb
BB x bb
BB x BB
bb x bb
Which statement reflects a way in which asexual reproduction is beneficial? Select all that apply.
It results in genetic variation.
It requires a lot of time and energy.
Organisms can reproduce without a mate.
It is a much quicker process.
Which statement describes why genetic variation is beneficial to populations of organisms?
individuals look different from one another
only one parent is needed to produce offspring
populations of the organism increase more rapidly
species can better survive environmental changes
Which of the following are disadvantages of sexual reproduction? Select all that apply.
Requires two parents
Slower process
Greater genetic variation
Removes bad genes
Which of the following are disadvantages of asexual reproduction? Select all that apply.
Overcrowding possible
Inability to adapt to new environments
Quicker process
Produces more offspring
