WorksheetsHeredity Review
Total questions: 34
Worksheet time: 41mins
Diagram A represents which process?
fertilization
meiosis
mitosis
binary fission
Diagram B represents which process?
fertilization
mitosis
binary fission
meiosis
Which process is represented by the diagram?
mitosis
meiosis
binary fission
fertilization
Figure 2 depicts two chromosomes that contain the same genes in the same locations, represented by the letters A, B, and C. Which of the following terms should be used to describe these chromosomes?
identical
sister chromatids
X and Y
homologous
Down syndrome is a genetic disorder caused by the presence of an extra chromosome number 21 in the body cells of humans. The extra chromosome is most likely the result of
Development of an unfertilized egg
Nondisjunction during meiosis.
Sex-linkage of the trait
Mitotic cell division in the brain
Which of the mutated chromosomes above could have resulted from a deletion in the
original chromosome?
chromosome 1
chromosome 2
chromosome 3
chromosome 4
Which of the following correctly pairs mitosis and meiosis with the type of reproduction with which they are associated?
Mitosis – Asexual Reproduction; Meiosis – Asexual Reproduction
Mitosis – Sexual Reproduction; Meiosis – Sexual Reproduction
Mitosis – Asexual Reproduction; Meiosis – Sexual Reproduction
Mitosis – Sexual Reproduction; Meiosis – Asexual Reproduction
Assume a white cabbage butterfly mates with a yellow cabbage butterfly, and all of the offspring (F1) are heterozygous and white.
Which cross represents the genotypes of the parent generation?
AA x aa
AA x Aa
Aa x Aa
Aa x aa
Goats have been genetically modified to produce an anticlotting protein in their milk. The protein is extracted from the milk and given to people who have inherited a disorder that causes their bodies to produce blood clots, which can be fatal.
What is a benefit of the technology used to produce this protein?
It will result in healthier goats with more nutritious milk for their offspring.
It can be used to detect inherited diseases in farm animals and humans.
It can be used to make proteins in large quantities that the affected people cannot make.
It can provide people with a new kind of nutrient-rich milk to fight infectious disease.
Two heterozygous purple-flowering pea plants are crossed. If purple is dominant over white, what are the expected phenotypic results?
50% purple
50% white
25% white
75% purple
75% white
25% purple
100% purple
The Punnett square in Figure 9 depicts a type of cross known as a monohybrid cross, and it is similar to crosses performed by Gregor Mendel. Which of the following arguments can NOT be defended using the evidence in this Punnett square?
Homozygous recessive plants have white flowers.
If one heterozygote was fertilized by another heterozygote, it is likely that 75% of the next generation of plants would have purple flowers.
Having purple flowers gives plants an advantage over plants with white flowers, making the purple ones more likely to survive and produce more offspring.
The purple phenotype is dominant and the white phenotype is recessive.
Which of the following represents the genotypes of the parents in this dihybrid cross?
ggYy x ggYy
GgYY x GgYY
GgYy x GgYy
GGYY x GGYY
The pedigree in Figure 12 below follows a recessively inherited trait.
What is the genotype of individual IV,1?
Not enough information
AA
aa
Aa
The pedigree in Figure 12 below follows a recessively inherited trait.
What is the sex of individual IV,1?
undetermined
female
male
The pedigree in Figure 12 below follows a recessively inherited trait.
If individuals II,1 and II,2 had more children, what is the probability that they would express this recessive trait?
0%
25%
50%
100%
A labradoodle is mix between a Labrador Retriever and a Standard Poodle. Labradoodles have wavy coats (CS) while Labrador retrievers have straight coats (SS) and standard poodles have curly coats (CC). Figure 13 depicts the types of coats. What inheritance pattern best describes the inheritance of coat pattern in these dogs?
traditional dominance
codominance
incomplete dominance
sex-linked recessive
A labradoodle is mix between a Labrador Retriever and a Standard Poodle. Labradoodles have wavy coats (CS) while Labrador retrievers have straight coats (SS) and standard poodles have curly coats (CC). Figure 13 depicts the types of coats.
If a labradoodle has offspring with another labradoodle, what is the probability that their offspring will have curly coats?
0
25
50
100
The image in Figure 14 below is a model of a cell undergoing meiosis. Assume that this cell belongs to a species with a diploid number of 6. Which of the following statements could be cited as evidence that the cell is in Metaphase I?
The spindle fibers have attached to the chromosomes and will separate soon.
The cell contains the diploid number of chromosomes and the chromosomes are in homologous pairs.
The chromosomes are aligned across the center of the cell and are identical.
The chromosomes are duplicated, with each chromosome consisting of two sister chromatids.
Which process can produce a large group of organisms with identical genotypes?
sexual reproduction
cloning
meiosis
fertilization
In the diagram shown in Figure 3 below, which type of change most likely caused the new combination of traits in gametes B and C?
An alteration in the number of sugars in DNA
A change in the chromosome composition due to crossing over.
A change in the chromosome number due to nondisjunction.
An alteration in the chemical composition of the gene
Farmer Brown grows corn for a living. His corn production has steadily declined over the past decade. One day, Farmer Green suggests to Farmer Brown that he should clone his highest-yielding corn plant in order to produce more ears of corn per plant next year. Farmer Brown is not sure about Farmer Green’s idea as he heard both positive and negative outcomes about cloning.
Why might Farmer Brown be hesitant to clone his corn?
Cloning decreases genetic variability of the corn plants.
Cloned plants would have a shortened life expectancy.
The cloned corn would not have the same taste as the original plants.
Cloning the corn plants is difficult and expensive to accomplish.
Which of the mutated chromosomes could have resulted from a duplication in the
original chromosome?
chromosome 1
chromosome 2
chromosome 3
chromosome 4
Student created a Punnett square to show a cross between a homozygous furred mouse (FF) and a homozygous furless mouse (ff). The students then created a Punnett square for a cross between two heterozygous F1 mice. Which of the following questions could be answered using the information from the Punnett squares in Figure 10?
Will fewer furless mice survive to adulthood than furred mice?
Are furred mice the best organism to use for this investigation?
Can furred mice produce furless mice?
Will fewer furless mice survive to adulthood than furred mice?
What will be the phenotypic ratio of offspring in this dihybrid cross?
1:2:1
1:1:1:1
1:3:3:9
9:3:3:1
Holstein cattle are a breed of dairy cow. One allele codes for a white coat; the other allele codes for a black coat. Heterozygotes express both of these colors simultaneously, resulting in animals that have black and white “spots.” If a spotted parent mates with a black parent, what is the percent chance of a spotted baby calf?
0%
25%
50%
100%
Fruit flies have a diploid number of 8. How many chromosomes would you expect to find in a gamete of a fruit fly?
8
16
2
4
According to the gel electrophoresis in Figure 5 to the right, which two dear species are most closely related?
1 and 2
1 and 3
2 and 3
3 and 4
What is the sex of the person who provided this karyotype?
male
female
undetermined
If the karyotype has a mutation at chromosome 21. What is the most likely cause for this mutation?
The chromosomes failed to separate during meiosis.
The chromosomes separated improperly during mitosis.
There was an error during DNA replication before meiosis.
The chromosomes exchanged information with other chromosomes during meiosis.
Which cross could produce a child with type O blood?
The diagram in Figure 7 represents DNA fingerprints which are the result of gel electrophoresis done on several DNA samples found at a crime scene. Which suspect is linked to the crime scene based on this DNA analysis?
suspect A
suspect B
suspect C
suspect D
A transgenic organism carries an altered genome containing foreign DNA. According to the illustration, if the gene that was added codes for proteins, how will humans get the proteins from the sheep?
transgenic offspring
sheep ovum
milk from sheep
blood from sheep
Sexual reproduction requires much more energy use from parents. Which of the following best explains why sexual reproduction is valuable for life despite its large energy investment?
Sexual reproduction produces genetically non-identical offspring, whereas asexual reproduction produces genetically identical offspring.
Asexual reproduction does not require two parents, so it is easier than sexual reproduction.
Asexual reproduction makes more offspring which are harder to care for, whereas sexual reproduction makes fewer offspring.
Sexual reproduction ensures there are no mutations in offspring whereas asexual reproduction creates too many mutations.
In pigs, the allele for a wavy, rough coat (R) is dominant to the allele for a soft (smooth), fine coat (r). A rough coat male and a smooth coat female mate. They produce several litters, 50% are rough coat and 50% are smooth coat. What must be the genotypes of the parents to create this phenotypic ratio?
Homozygous dominant and homozygous recessive
Homozygous dominant and heterozygous
Homozygous dominant and homozygous recessive
Both heterozygous
