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BIO235 Comprehensive Final Questions with
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Quiz: 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.
Ans: d) Pairing and synapsis of homologous chromosomes
Quiz: 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
Ans: c) 39
Sunday, 02 March 2025
,Quiz: 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
Ans: b) prophase I; metaphase I,
Quiz: 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%
Ans: e) 100%
Quiz: 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
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, b) Codominance
c) Incomplete dominance
d) Gene interaction
e) Expressivity
Ans: a) Pleiotropy
Quiz: 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.
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