Download 7 Grade Science Sample Assessment Items S7L3a.

7th Grade Science Sample Assessment Items
S7L3a.
The figures to the right represent two chromosomes from
an animal.
Using the table below that describes the traits carried on
Chromosome #6, which trait can the animal inherit only
from its mother?
Genes on
Chromosome #6
H
h
B
b
Trait
Long hair
Short hair
Black hair
White hair
A. Long hair*
B. Black hair
C. White hair
D. Short hair
Which Punnett Square should be used to predict the results of a cross between two people
with genotypes of Bb? Answer: D
The physical expression of a genetic trait is called a _____.
A. mutation
B. genotype
C. phenotype*
D. crossing over
How much genetic material is found in a cloned cell as compared to the original cell?
A. twice as much
B. half as much
C. the same amount*
D. one-fourth as much
7th Grade Science Sample Assessment Items
S7L3a.
Each form of a gene is called an allele. The alleles for human blood type are A, B, and O.
Both the allele for type A blood and type B blood are dominant. The allele for type O blood is
recessive. What blood type will a person have if he inherits an allele for type A and an allele
for type O?
A. A*
B. B
C. AB
D. O
Selina's cat has three kittens. Look at the pictures below of the father cat and the mother cat.
Which set of kittens probably belongs with the father cat and mother cat? Answer: A
In humans, having bushy eyebrows is a trait that is dominant over having thin eyebrows. Two
parents with bushy eyebrows are going to have a baby. What can be predicted about how the
baby's eyebrows will develop?
A. There is not enough information given.
B. The baby will not have bushy eyebrows.
C. The baby definitely will have bushy eyebrows.
D. The baby most likely will have bushy eyebrows.*
7th Grade Science Sample Assessment Items
S7L3a.
Brown eyes are dominant to blue eyes. Both of Donna's parents have brown eyes, but Donna
has blue eyes. What is the BEST explanation for why Donna has blue eyes?
A. Both of Donna's parents carry a gene for blue eyes.
B. All of Donna's grandparents must have had blue eyes.
C. Donna's father probably carries the gene for blue eyes.
D. Donna's mother probably carries the gene for blue eyes.
Mike and his three brothers all have brown hair. Mike's father has brown hair, too. Mike's
mother, however, is the only family member that has red hair color. What conclusion can you
draw about the gene for hair color?
A. Red and brown genes are co-dominant.
B. The gene for red hair is dominant over the gene for brown hair.
D. The gene for brown hair is dominant over the gene for red hair.*
D. Neither brown nor red are dominant since they both occur in the same family.
Rudy has blue eyes, while Gertrude has brown eyes. What causes them to have different eye
colors?
A. They have different chromosomes for the two eye colors.
B. They have different combinations of the genes for eye color.*
C. Rudy has a different number of chromosomes than Gertrude.
D. Rudy's mother must have had blue eyes, because you only get blue eyes from your
mother.
In pea plants, purple flowers are dominant to white flowers. Suppose a purple-flowered plant
with genotype Pp is crossed with another purple-flowered plant with the same Pp genotype.
What percentage of offspring will also have purple flowers?
A. 25%
B. 50%
C. 75%*
D. 100%
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 a trait that is ______.
A. blended
B. dominant*
C. mutated
D. recessive
7th Grade Science Sample Assessment Items
S7L3a.
Which of these is due entirely to inheritance in humans?
A. Eye color*
B. Endurance
C. Reading skill
D. Broken bones
DNA is essential to living organisms because it _____.
A. is a spiral helix
B. can break apart
C. can prevent diseases
D. carries the genetic code*
Describe the relationship between genes, chromosomes and heredity.
Describe how the color of a person’s eyes is determined.
Identify characteristics that you are likely to inherit from a parent and characteristics that you
are least likely to inherit from a parent.
7th Grade Science Sample Assessment Items
S7L3a.
The diagram to the right represents 23 pairs of structures
taken from the nucleus of a human body cell.
Identify the structures shown in the diagram.
Identify the information that is contained within these
structures.
Describe how the structures from this cell would compare
to the structures in the nucleus of another body cell from
the same person.
Explain why the structures are in pairs.