BIO235 Comprehensive Final – Complete Review with Practice
Questions and Correct answers for Human Anatomy & Physiology II:
Cardiovascular, Respiratory, Renal, and Endocrine Systems
Which of the following occurs exclusively in meiosis?
a) Chromosomes condense, nuclear membrane dissolves.
b) Kinetochores attach to spindle fibers.
c) Chromosomes align on the equatorial plate of the cell.
d) Pairing and synapsis of homologous chromosomes
e) Sister chromatids separate. - correct answer d) Pairing and synapsis of homologous
chromosomes
How many bivalents form during prophase of meiosis I in the primary oocyte of the gray wolf
(Canis lupus) which has 78 chromosomes in its diploid cells?
a) 156
b) 78
c) 39
d) 18 in the male and 19 in the female e) 4 - correct answer c) 39
In meiosis, homologous chromosomes pair and cross over during ___________, and bivalents
line up on the equatorial plate of the cell during _________.
a) prophase II; metaphase I,
b) prophase I; metaphase I,
c) metaphase I, metaphase II
d) metaphase II, prophase I
e) metaphase II, prophase II - correct answer b) prophase I; metaphase I,
In a cross of AABB x aabb, how frequent are the individuals displaying the dominant trait for
both genes in the F1 offspring?
a) 0
b) 1/16
, c) 3/16
d) 9/16
e) 100% - correct answer e) 100%
The phenomenon in which a single gene is responsible for both salty sweat on the skin and
thick mucus in the lungs, is described as
a) Pleiotropy
b) Codominance
c) Incomplete dominance
d) Gene interaction
e) Expressivity - correct answer a) Pleiotropy
As a horticultural breeder, you travel to Spain to collect wild daffodil (Narcissus
pseudonarcissus) plants for your breeding work. Among your collection, there are two white-
flowered plants, rare mutants of this normally yellowflowered species. When you cross these
two white-flowered plants, you obtain an F1 progeny that is uniformly yellow-flowered. The
two white-flowered mutants complement one-another, because
a) they have mutations in two different genes of the same biochemical pathway.
b) they have mutations in the same gene of the same biochemical pathway.
c) have mutations in genes of two different biochemical pathways.
d) Neither of them has any wild-type alleles in the entire β-carotene (flower color pigment)
pathway
e) None of the other explanations is plausible. - correct answer a) they have mutations in two
different genes of the same biochemical pathway.
You obtained an all purple-seeded F1 progeny from the cross of two white-seeded maize
plants. When you cross two purple-seeded F1 plants, you obtain an F2 population in which seed
color segregates 9 purple : 7 white (see below). What type of inheritance are you dealing with?
a) Incomplete dominance
b) Dominant epistasis
c) Recessive epistasis
d) Complementary gene action (duplicate recessive epistasis)
Questions and Correct answers for Human Anatomy & Physiology II:
Cardiovascular, Respiratory, Renal, and Endocrine Systems
Which of the following occurs exclusively in meiosis?
a) Chromosomes condense, nuclear membrane dissolves.
b) Kinetochores attach to spindle fibers.
c) Chromosomes align on the equatorial plate of the cell.
d) Pairing and synapsis of homologous chromosomes
e) Sister chromatids separate. - correct answer d) Pairing and synapsis of homologous
chromosomes
How many bivalents form during prophase of meiosis I in the primary oocyte of the gray wolf
(Canis lupus) which has 78 chromosomes in its diploid cells?
a) 156
b) 78
c) 39
d) 18 in the male and 19 in the female e) 4 - correct answer c) 39
In meiosis, homologous chromosomes pair and cross over during ___________, and bivalents
line up on the equatorial plate of the cell during _________.
a) prophase II; metaphase I,
b) prophase I; metaphase I,
c) metaphase I, metaphase II
d) metaphase II, prophase I
e) metaphase II, prophase II - correct answer b) prophase I; metaphase I,
In a cross of AABB x aabb, how frequent are the individuals displaying the dominant trait for
both genes in the F1 offspring?
a) 0
b) 1/16
, c) 3/16
d) 9/16
e) 100% - correct answer e) 100%
The phenomenon in which a single gene is responsible for both salty sweat on the skin and
thick mucus in the lungs, is described as
a) Pleiotropy
b) Codominance
c) Incomplete dominance
d) Gene interaction
e) Expressivity - correct answer a) Pleiotropy
As a horticultural breeder, you travel to Spain to collect wild daffodil (Narcissus
pseudonarcissus) plants for your breeding work. Among your collection, there are two white-
flowered plants, rare mutants of this normally yellowflowered species. When you cross these
two white-flowered plants, you obtain an F1 progeny that is uniformly yellow-flowered. The
two white-flowered mutants complement one-another, because
a) they have mutations in two different genes of the same biochemical pathway.
b) they have mutations in the same gene of the same biochemical pathway.
c) have mutations in genes of two different biochemical pathways.
d) Neither of them has any wild-type alleles in the entire β-carotene (flower color pigment)
pathway
e) None of the other explanations is plausible. - correct answer a) they have mutations in two
different genes of the same biochemical pathway.
You obtained an all purple-seeded F1 progeny from the cross of two white-seeded maize
plants. When you cross two purple-seeded F1 plants, you obtain an F2 population in which seed
color segregates 9 purple : 7 white (see below). What type of inheritance are you dealing with?
a) Incomplete dominance
b) Dominant epistasis
c) Recessive epistasis
d) Complementary gene action (duplicate recessive epistasis)
