Name: __________________________________________
Date: _______________
Quiz name: Final exam part 1-genetics
1.
Kyli reads an article that describes how frogs within a specific species can change their gender.
She reads that when the population of female frogs is high, some of the female frogs change
their gender to become male frogs to maximize breeding opportunities. What should Kyli
conclude as the most likely mechanism through which the gender change occurs?
A
cell differentiation as a result of an environmental factor
B
cell differentiation as a result of a viral infection
C
natural selection as a enviromental factor
D
natural selection as a result of a viral infection
2.
Cell Differentiation is critical during embryonic development. The process of cell differnentiation
results in the production of many types of cells, including germ, somatic and stem cells. Cell
differentiation is most directly regulated by --- A
ATP
B
DNA
C
D
3.
lipids
sugars
How can environmental factors, such as temperature and light, affect cell differentiation?
A
These environmental factors can cause certain genes to either be expressed or repressed
B
These environmental factors can remove genes from developing organisms
C
D
These environmental factors can add genes to a developing organism, which causes cell
differentiation
These environmental factors can make change positions within the DNA
4.
What phase of the cell cycle does cell division occur?
5.
When cells leave the cell cycle, they exit during G1 phase and enter the G0 phase, a resting
period. Most normal cells can leave G0 phase and reenter the cell cycle at G1 phase before
entering S phase. Cancer cells are different because they cannot enter G0 phase and are likely
to do which of the following?
A
fail to complete S phase
B
mutate during the G 1 phase
C
repeat the cell cycle continuously
D
die after completing mitosis
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6.
Look at the picture. What type of mutation as occurred?
A
a deletion of a base that has caused the strand of mRNA to
code for a different nucleotide
B
a substitution of a base has caused the strand of mRNA to
code for a different nucleotide
C
An insertion of a base has caused the strand of mRNA to
code for a duplicate polypeptide
D
a deletion of a base has caused the strand of mRNA to code
for a different polypeptide
7.
When are mutations passed to offspring?
8.
A mutation that occurs in the gametes of an organism will most likely be transferred to which of
the following?
A
the siblings of the organism
B
the mating partner of the organism
C
the other organism living nearby
D
the offspring of the organism
9.
The genetic code in DNA is represented by unique codons that represent a specific amino acid.
Which of the following represents a codon?
A
G
B
TA
C
GCGC
D
CAT
10.
Not all hereditary traits follow Mendelian genetics. So do not exhibit the patterns of dominate
and recessive alleles. For example, the alleles that determine the color of the flower for a
flowering plant called the four o'clock plant exhibits incomplete dominance. The Punnett square
shows a cross between a homozygous red flower and a homozygous white flower. Because
neither the allele for the color red and the allele for the color white are dominant, the flower for
the F1 generation produced by this cross is predicted to be ---
A
red
B
white
C
pink
D
red and white
11.
In cocker spaniels the allele for black coat color (B) is dominant over the allele for a brown coat
color (b). If a brown cocker spaniel is crossed with a heterozygous black cocker spaniel, which of
the following genotypic ratios can be expected?
A
0 BB: 2 Bb : 2 bb
B
1 BB : 2 Bb : 1 bb
C
2 BB : 0 Bb : 2 bb
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D
2 BB : 1 Bb : 0 bb
12.
What is asexual reproduction? Will mutations be passed to the offspring?
13.
A drop of blood was taken from a robbery. The blood was taken from the lab and examined.
The DNA will be processed and compared to records of the suspect's DNA. This process is
called _____. Based on the DNA, which suspect commited the crime?
14.
The technique known as chromosome painting is the result of scientific research. Scientists use
chromosome painting to mark the locations of genes on human chromosomes with fluorescent
tags. It is also possible to apply this technique to the chromosomes of many different species.
Chromosomes painting allows for which of the following?
A
The extraction of amino acids from different species
B
The sequencing of proteins from many species
C
an increase in mutations in many species
D
a comparison of the genomes of different species
15.
What is chromosomal analysis?
16.
Based on the karyotype, what is the syndrome and sex of the indiviual?
A
trisomy 13, male
B
trisomy 13, female
C
trisomy 21, male
D
trisomy 21, female
17.
Which description correctly identifies the structure of DNA?
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A
DNA is a sphere in which nucleotides are arranged with their
nitrogen bases pointed toward the center and their sugar and
phosphate groups pointing outward and connecting them
together
B
DNA is a single strand made of a chain of nucleotides held
together by hydrogen bonds that is ound tightly into a helix
wire
C
DNA is a double helix with two strands of nucleotides wound
around each other and held together by hydrogen bonds
between nitrogenous bases. D
DNA is double sphere with the core containing nitrogenous
bases, the inner sphere made of a sugar chain, and the outer
sphere made of phosphate chain
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