Every cell contains __________ which contains the code of who you are and the instructions for life.
Question 1 options:
DNA
nucleotide
DNR
cytoplasm
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Question 2 (3 points) Question 2 Saved
A segment of DNA that determines a particular trait is called a __________.
Question 2 options:
helix
chromosome
gene
nucleotide
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Question 3 (3 points) Question 3 Saved
How many pairs of chromosomes does a human have?
Question 3 options:
52
46
23
24
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Question 4 (3 points) Question 4 Unsaved
Having a dimpled cheek is a dominant trait (D) and having a non-dimpled cheek is a recessive trait (d). If someone is homozygous dominant, then what genotype does the person carry?
Question 4 options:
Ddd
dd
Dd
DD
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Question 5 (3 points) Question 5 Saved
The physical trait that an organism expresses is called the _________.
Question 5 options:
heterozygote
homozygote
phenotype
genotype
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Question 6 (3 points) Question 6 Unsaved
T is the allele that represents a thorned plant
t is the allele that represents a non-thorned plant
What is the genotype of a plant that is heterozygous for the thorned trait?
Question 6 options:
TT
tt
TTt
Tt
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Question 7 (3 points) Question 7 Unsaved
R is the allele for red leaves
r is the allele for yellow leaves
If a plant has the genotype Rr, what phenotype does the plant express?
Question 7 options:
Red
Orange
Gold
Yellow
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Question 8 (3 points) Question 8 Saved
What phase of mitosis is shown below where the chromosomes line up in the middle?
mitosis
Question 8 options:
Telophase
Metaphase
Prophase
Anaphase
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Question 9 (3 points) Question 9 Unsaved
Mitosis is a means of a cell undergoing asexual reproduction to produce two new cells.
Question 9 options:
True
False
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Question 10 (3 points) Question 10 Unsaved
Pairs of the same chromosome as found in a karyotype are called homologous chromosomes.
Question 10 options:
True
False
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Question 11 (3 points) Question 11 Unsaved
When DNA tightly coils up, it forms a(an) __________.
Question 11 options:
karyotype
gene
chromosome
allele
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Question 12 (3 points) Question 12 Unsaved
DNA has a structure that resembles a twisted ladder. This structure is called a______________.
Question 12 options:
double spiral
double helix
helical
double ladder
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