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Genetics-Exam 1 (Ch 1-4) With Complete Solutions Latest Update 2024
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Genetics-Exam 1 (Ch 1-4) With Complete SolutionsLatest Update 2024
What is genetics? - correct answers study of genes and what they do; branch of
biology that deals with heredity and variation
root of the natural diversity that we observe among members of the same species
as well as among different species - correct answers Genetic variation
Gene - correct answers "Unit of heredity", usually described according to the way
it affects the traits or characteristics of an organism
How many genes are there? - correct answers Around 30,000-35,000
How much of the genome is coded for? - correct answers less than 5 %
What is the largest cellular molecule in humans? - correct answers DNA
Categories of larger cellular molecules: - correct answers Nucleic acids (DNA, RNA),
Proteins, Carbohydrates and lipids
Proteome - correct answers All the proteins that a cell makes at a given time
,Constitutive Gene - correct answers Unregulated; different cell types; transcribed
continually; different types
Housekeeping Gene - correct answers Ongoing business; histones; continually
made; can control (turn on/off) housekeeping depending on growth cycle
Inducible - correct answers Gene that can be turned on or off; produces proteins
on a continual basis
Genetic Code - correct answers DNA sequences within most genes contain the
information to direct the order of amino acids within polypeptides
Which codon is the least conserved? - correct answers Last
Does every gene code for a protein? - correct answers NO! tRNA, rRNA, mRNA
When studying a genetic cross, the second generation following the initial cross is
identified by which of the following?
a. P generation
b. F1 generation
c. F2 generation
d. F3 generation
e. P3 generation - correct answers F2 generation
, A true bredding line of green pod pea plants is crossed with a true-breeding line of
yellow pod plants. All of their offspring have green pods. From this information, it
can be stated that the green color is_____.
a. recessive
b. dominant
c. subservient
d. blended
e. non of the answers are correct - correct answers dominant
When Mendel crossed two plants that were heterozygous for a single trait, what
was the phenotypic ratio of their offspring?
a. 1 : 2 : 1
b. 9 : 3 : 3 : 1
c. 3 : 1
d. 7 : 4
e. varied depending on the trait - correct answers 3:1
An individual who has two identical alleles for a trait is said to be _____.
a. homozygous
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