Biology 111 Test 1 Questions with Correct
Answers
Deletions and substitutions are two types of point mutations. Which is more likely to
cause mistranslations of proteins?
Deletions are more likely to cause mistranslations of proteins because they shift the reading
frame and cause downstream amino acids to be changed.
___________________ reproduction require that _________________ gamete be
produced through the process of meiosis. This is important because at fertilization of
the _______________ number is restored in the developing offspring.
Sexual; haploid; diploid
Which of the following statements about mutations is false?
Mutations always decrease an organisms fitness
In the case of Mendels peas, a single gene with two alleles determined the height of the
plant. However, in humans is adult height is influenced by many genes and multiple
alleles trait s such as human height is said to be
Polygenetic
Healthy Individuals may have just one sex chromosome as long as it is an X
chromosome. Why is this the case?
The X chromosome has a full complement of genetic material, much of which is vital to life;
the Y chromosome is missing the most of these genes.
What are the possible genetic combinations in the gametes produced by a parent with
the genotype, AaBb?
, AB, Ab, aB, ab
The difference in sizes between male and female gametes results from two unequal
divisions of _______________ in female gamete development.
Cytoplasm
In peas, tall plants (T) are dominant to dwarf (t) and green seeds (G) are dominate to
yellow (g). What proportion of the offspring from a cross between heterozygous tall,
green-seeded individuals will be tall and have yellow seeds?
3/16
The genes that code for proteins constitute a surprisingly small portion of the genomes
of most multicellular eukaryotes. The majority of most eukaryotic genomes consist of
non-coding regions. Which of the following is the type of non-coding regions. Which of
the following is the type of non-coding DNA region found within genes? (Hint: you
amplified yours during lab)
Introns
During meiosis but NOT during mitosis
Genetic variations among the daughter cells is increased
The complementary base pairs in a DNA molecule are stabilized by ___________, while
the sugar-phosphate backbone is stabilized by ___________
Hydrogen bonds, covalent bonds
Phenotypes are generally a product of
The genotype in combination with the environment.
All of the following statements about DNA are true EXCEPT"
Answers
Deletions and substitutions are two types of point mutations. Which is more likely to
cause mistranslations of proteins?
Deletions are more likely to cause mistranslations of proteins because they shift the reading
frame and cause downstream amino acids to be changed.
___________________ reproduction require that _________________ gamete be
produced through the process of meiosis. This is important because at fertilization of
the _______________ number is restored in the developing offspring.
Sexual; haploid; diploid
Which of the following statements about mutations is false?
Mutations always decrease an organisms fitness
In the case of Mendels peas, a single gene with two alleles determined the height of the
plant. However, in humans is adult height is influenced by many genes and multiple
alleles trait s such as human height is said to be
Polygenetic
Healthy Individuals may have just one sex chromosome as long as it is an X
chromosome. Why is this the case?
The X chromosome has a full complement of genetic material, much of which is vital to life;
the Y chromosome is missing the most of these genes.
What are the possible genetic combinations in the gametes produced by a parent with
the genotype, AaBb?
, AB, Ab, aB, ab
The difference in sizes between male and female gametes results from two unequal
divisions of _______________ in female gamete development.
Cytoplasm
In peas, tall plants (T) are dominant to dwarf (t) and green seeds (G) are dominate to
yellow (g). What proportion of the offspring from a cross between heterozygous tall,
green-seeded individuals will be tall and have yellow seeds?
3/16
The genes that code for proteins constitute a surprisingly small portion of the genomes
of most multicellular eukaryotes. The majority of most eukaryotic genomes consist of
non-coding regions. Which of the following is the type of non-coding regions. Which of
the following is the type of non-coding DNA region found within genes? (Hint: you
amplified yours during lab)
Introns
During meiosis but NOT during mitosis
Genetic variations among the daughter cells is increased
The complementary base pairs in a DNA molecule are stabilized by ___________, while
the sugar-phosphate backbone is stabilized by ___________
Hydrogen bonds, covalent bonds
Phenotypes are generally a product of
The genotype in combination with the environment.
All of the following statements about DNA are true EXCEPT"
