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Bio Principles Final Exam Questions And Accurate Answers
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Bio Principles Final Exam Questions And AccurateAnswers 2024-2025
Red color in cornsnakes is dominant to albinism. You are given a cross between two
heterozygous red cornsnakes,
a. What is the possibility of obtaining a red cornsnake? You may use fractions, decimals
with two places (0.XX), or percents with two digits and a percent symbol (XX%). (2 pts)
b. Fill in the equation with correct numbers to determine this probability: Of three
cornsnake offspring born from this cross, what are the chances of getting one albino
and two red snakes in any order? (3 pts)
c. Give your answer for part b using fractions, decimals or percents as above. -Answer
a. 75%
b. 3x0.25x0.75x0.75
c. 27/64
Black fur is dominant to brown fur in mice, and short tails are dominant to long tails. For
the following cross: BbTt x BBtt: a. What are all the possible gametes for the BbTt
parent? b. What are all the possible gametes for the BBtt parent?.
c. What percent of the possible progeny from this cross will have black fur and long
tails? You can write fractions, decimals 0.X, or percentages XX% - Solution a. BT, Bt, bT,
bt
b. Bt
c. 50%
A father has type A blood and the mother and child have type O blood. Take "I" and "i"
for alleles (note if you choose to use alleles with exponents you can use the carat symbol
(^) to denote the exponent (I^A) or just put the exponent next to the base letter (IA))
a. Give the genotype of the father. (1 pt)
b. Give the genotype of the mother. (1 pt)
c. What is the phenotype and genotype ratio of all possible offspring from this cross? (2
,pts) - Solution a. IAi
b. ii
c. 1 AO: 1 OO
An inherited form of rickets (a bone disease) is caused by a Xlinked dominant trait. An
unaffected female and an affected male decide to have children.
a. Give the chromosomes allele(s) for the unaffected female. You can use carats for the
exponents (i.e. X^R) or just put them next to each other (i.e. XR).
b. Give the chromosomes allele(s) for the affected male.
c. Give the chromosomes and alleles for all possible offspring.
d. Give the phenotype ratio for female offspring.
e. Give the phenotype ratio for male offspring. - Answer a. Xr Xr
b. XRY
c. XR Xr, XrY
d. all have rickets
e. all unaffected
During meiosis I, sister chromatids are attached to each other at the region of the __ The
protein structure that is connected to this region, and then connects to microtubules, is
called the __ - Answer centromere, kinetochore
Achondroplasia is a disorder of bone growth that leads to dwarfism. If a person has one
allele for achondroplasia and one for average height, that heterozygous allele
combination would be their __ The uncommonly short height of the person would be
their __ - Answer genotype, phenotype
a. In about one sentence explain the process of nondisjunction. Note this is different
than aneupoidy (a pattern that is the result of nondisjunction).
b. Name one disorder in humans resulting from nondisjunction during gamete
production. - Answer a. Nondisjunction is when sister chromatids fail to separate
properly during meiosis
,b. Turner syndrome
a. Give an example of a plant that does organellar inheritance
b. Name one organelle passed from parent to offspring.
c. Specify which parent normally provides the organelle listed in part b. - Solution a.
angiosperm
b. mitochondria
c. female
The overall process of reproduction involves three events that must occur in every cell
of every organism in all three domains. Identify one of these events. - Solution divide the
cell
The above figure is of the chromosomes of a female chicken, or hen. An image of all
lined up condensed chromosomes is called a __ An image of all lined up condensed
chromosomes is called a __ The hen has 76 homologous chromosomes, so these
chromosomes would be termed as __ She also has a large Z chromosome and a small W
chromosome; these are the __ chromosomes - Answer karyotype, autosomes, sex
a. Based on the pedigree above select the letter of the correct answer. The disorder in
question is:
A) autosomal dominant
B) autosomal recesive
C) sex-linked recessive
D) holandric (Y-linked)
E) unknown because the pattern cannot be determined based on this pedigree
b. Using A and a, give the genotype(s) of the individual in generation IV, number 1 -
Answer a. B
b. Aa
Compare mitosis and meiosis in the blanks below:
, a. Number of daughter cells per parent cell in mitosis __ Number of daughter cells per
parent cell in meiosis __
b. If the parent cell is diploid, ploidy of daughter cells (e.g. haploid, diploid, triploid,
tetraploid) after mitosis __ If the parent cell is diploid, ploidy of daughter cells after
meiosis __
c. Daughter cells are the following after mitosis __ Daughter cells are the following after
meiosis __
d. Number of cycles of cell division in mitosis __ Number of cycles of cell division in
meiosis __ - Answer a. 2, 4
b. diploid, haploid
c. identical, nonidentical
d. 1, 2
Give one reason why the use of pea plants was useful to Gregor Mendel in his studies of
inheritance. - Answer many varieties of peas were available
During what stage of cell division does pairing of homologous chromosomes occur?
anaphase I of meiosis
prometaphase of mitosis
prophase I of meiosis
metaphase II of meiosis
metaphase of mitosis - Answer prophase I of meiosis
How does the interaction of microtubules and chromosomes differ between meiosis I
and mitosis?
Meiosis I involves the attachment of microtubules to two sister chromatids of a
homologous chromosome, while in mitosis, the attachment is done to each sister
chromatid.
Meiosis I involves the attachment of a microtubule to an entire tetrad that will move it to
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