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WorksheetsUnit 5 Review
Total questions: 16
Worksheet time: 13mins
Match the vocabulary word to the definition
version of a gene
Gene
section of a chromosome that has the code for a trait
Allele
carries the genetic code in the form of genes
Chromosome
tightly wound strand of DNA
DNA
A student used a computer simulation to build a model of a DNA molecule. Which of the following is the best suggestion to improve the model? (LS.10a)
Change the order of the nitrogenous bases.
Twist the model.
Fold the model in half.
Switch the position of the sugars and the nitrogenous bases.
Which of the following is true about DNA? Select two correct statements.
DNA determines which language people speak.
DNA codes genetic information for an entire organism.
DNA transfers genetic information between generations.
DNA transfers energy between cells.
In 1994, a scientist discovered the BRCA-1 gene. People with this gene have a much higher chance of developing breast cancer. This discovery now allows doctors to screen and treat people before cancer develops.
What does the discovery of the BRCA-1 gene demonstrate about the importance of researching genetics?
Understanding genetics helps us learn about our ancestors’ cultures.
DNA research can be used to solve crimes.
Genetic discoveries can help improve human health.
Genetic discoveries are often harmful to people.
What is the probability of the phenotypes of the offspring?
Black: 75%, White: 25%
Black: 50%, White: 50%
Black: 25%, White: 75%
Black: 100%, White: 0%
If only one parent was heterozygous (Ff) and the other one was homozygous dominant (FF), what are the probabilities for the genotype Ff of their offspring?
0%
25%
50%
75%
One breed of chickens can have either brown or white feathers. A brown chicken was crossed with a white chicken. Both parents were homozygous. All the offspring had brown feathers. What best describes the alleles for this trait?
Both parents have the same alleles for feather color.
The brown feather allele is recessive to the white feather allele.
The white feather allele is recessive to the brown feather allele.
The offspring have inherited the brown feather allele from both parents.
A characteristic that is developed during an individual’s lifetime.
Inherited
Acquired
Neither
Both
A characteristics that can be passed from parents to offspring.
Inherited
Acquired
Neither
Both
In humans, dimples (D) and freckles (F) are both dominant traits that can be inherited.
What is the genotype for a person with freckles?
FF
Ff
ff
Dd
If someone were to have the heterozygous genotype for a trait, how would that be represented using letters?
nN
NN
Nn
I am not sure
Name 4 the bases and which base each pairs with in a DNA strand.
Adenine (A) ----Guanine(G)
Guanine (G)-- Cytosine (C)
Thymine (T)--Adenine (A)
Adenine (A) Cytosine (C)
, Cytosine (C), and Guanine (G).
adenine (A)-- guanine (G)
cytosine (C)-- thymine (T)
If someone were to be homozygous for a trait, how would that be represented using letters
HH
Hh
HH and hh
All of the above
Chromosomes are made up of (a) , and variations of genes are known as (b) .
Sort the traits; inherited vs. acquired
Blue Eyes
Loves basketball
Tall
Speaks French
Has a scar
Brown Hair
Why is it possible for two parents with the same phenotype (brown hair) to produce offspring with a different phenotype (blonde hair)?
Neither parent had dominant alleles (bb, bb)
Parents had a combination of dominant and recessive alleles (Bb, Bb)
An offspring's phenotype is not related to the parents.
Offspring always inherit the EXACT phenotype of the parents
