BIO235 Comprehensive Final 2024/2025
Exam Questions and Answers | A+
Score Assured
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. - 🧠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
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,d) 18 in the male and 19 in the female e) 4 - 🧠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 - 🧠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% - 🧠ANSWER ✔✔e) 100%
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, 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 - 🧠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.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
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STATEMENT. ALL RIGHTS RESERVED
Exam Questions and Answers | A+
Score Assured
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. - 🧠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
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
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STATEMENT. ALL RIGHTS RESERVED
,d) 18 in the male and 19 in the female e) 4 - 🧠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 - 🧠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% - 🧠ANSWER ✔✔e) 100%
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
2
STATEMENT. ALL RIGHTS RESERVED
, 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 - 🧠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.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
3
STATEMENT. ALL RIGHTS RESERVED
