Download Chapter 10 Review Questions - 2017 Select the best answer choice

Chapter 10 Review Questions - 2017
Select the best answer choice for each question.
1. Use the diagram to answer the question.
In a breed of rabbits, black fur (B) is dominant to brown fur (b). The Punnett square shows a
cross between two black rabbits. What is the probability of phenotypes that will result from this
cross?
A. 50% brown fur, 50% black fur
B. 75% black fur, 25% brown fur
C. 100% brown fur, 0% black fur
D. 100% black fur, 0% brown fur
2. Many plants reproduce asexually. How does the genetic material (DNA) compare between
the new plant and the parent plant in this type of reproduction?
A. It is similar but not identical.
B. It depends on the characteristics of the parent plant.
C. It depends on the climate in which the plants are grown.
D. It is identical to that of the parent plant.
Grade 7 Science-Unit 6: Post-assessment
3. Which of the following best describes meiosis?
A. It is the first stage of mitosis.
B. It is carried out in all tissues that require cell replacement.
C. It happens in all tissues except the brain and spinal cord.
D. It occurs only in cells in the reproductive structures of organisms.
4. Use the diagram to answer the question.
The image shows a chromosome. Proteins build cells and tissues or work as enzymes. The
instructions for making a specific protein are found in a section of DNA on a chromosome.
What is that section of DNA on a chromosome that determines the type of protein?
A. cell
B. gene
C. organelle
D. zygote
Grade 7 Science-Unit 6: Post-assessment
5. Gregor Mendel, a priest during the mid-nineteenth century, experimented with thousands of
pea plants. Today, Mendel’s discoveries form the foundation of genetics, the scientific study of
heredity. Mendel’s early work with pea plants demonstrated a significant genetic discovery.
The crossing of homozygous tall pea plants with homozygous short pea plants always resulted in
tall plants and demonstrated that tallness in pea plants is what type of trait?
A. blended
B. dominant
C. mutated
D. recessive
6. If the sequence of bases on one side of DNA is ATCCGTC, what is the sequence on its other
side?
A. ATCCGTC
B. CGAATGA
C. UAGGCAG
D. TAGGCAG
7. Use the diagram to answer the question.
The diagram is a model of a cellular process in which
chromosome pairs separate into two different cells.
The sex cells that form later have only half as many
chromosomes as the other cells in the organism. What
is the name of this process?
A. mitosis
B. hybridization
C. meiosis
D. inbreeding
Grade 7 Science-Unit 6: Post-assessment
8. Use the diagram and a Punnett square to answer the question.
In pigeons, the allele for normal feathers (F) is dominant to the allele for frizzy feathers (f). If a
purebred, normal-feathered bird (FF) is crossed with a frizzy-feathered bird (ff), which answer
best describes the feather phenotypes that are possible in the offspring?
A.
B.
C.
D.
1 phenotype: normal
1 phenotype: (Ff)
2 phenotypes: normal and frizzy
2 phenotypes: (FF) and (ff)
9. Use the diagram to answer the question.
This is a diagram of a genetic cross. In guinea pigs, black hair color is dominant (B) and white
hair color is recessive (b). What hair color(s) are possible for these guinea pigs’ offspring?
A. all black
B. all white
C. mostly black with some white
D. mostly white with some black
Grade 7 Science-Unit 6: Post-assessment
Grade 7 Science-Unit 6: Post-assessment