Red color in cornsnakes (R) is dominant to albinism (r). In a cross between two heterozygous red cornsnakes,
a. What is the chance of getting a red cornsnake? You can use fractions, decimals with two places (0.XX), or percents with two digits and a percent symbol (XX%). (2 pts)
b. Show the equati...
Bio Principles Final Exam Questions and
Answers
Red color in cornsnakes (R) is dominant to albinism (r). In a cross between two
heterozygous red cornsnakes,
a. What is the chance of getting a red cornsnake? You can use fractions, decimals
with two places (0.XX), or percents with two digits and a percent symbol (XX%).
(2 pts)
b. Show the equation filled in with correct numbers for this probability problem: In
a group of three cornsnake offspring produced from this cross, what is the chance
of getting one albino and two red snakes, in any order? (3 pts)
c. Give the answer to part b. You can use fractions, decimals or percents as above.
(1 pt) - answer-✔a. 75%
b. 3x0.25x0.75x0.75
c. 27/64
Black fur in mice (B) is dominant to brown fur (b). Short tails (T) are dominant to
long tails (t). Given the cross BbTt x BBtt:
a. Give all possible gametes produced by the BbTt parent.
b. Give all possible gametes produced by the BBtt parent.
c. What proportion of the potential offspring of this cross will have black fur and
long tails? (You can use fractions, decimals formatted 0.X, or percents formatted
XX%) - answer-✔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. Give the genotype ratio of all possible offspring from this mating. (2 pts) -
answer-✔a. IAi
b. ii
c. 1 AO: 1 OO
An inherited form of rickets (a bone disease) is a X-linked dominant trait. An
unaffected female and an affected male decide to have children.
a. Give the chromosomes with 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 with allele(s) for the affected male.
c. Give the chromosomes and alleles for all potential 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
Throughout 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 an
individual has one allele for achondroplasia and one for average height, that
heterozygous allele combination would be their __ The uncommonly short height
of the individual would be their __ - answer-✔genotype, phenotype
a. In approximately one sentence, explain the process of nondisjunction. Note this
is different from 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. Identify which parent generally passes on the organelle listed in part b. - answer-
✔a. angiosperm
b. mitochondria
c. female
Three steps are required for successful reproduction in all cells, regardless of
domain. Give one of these steps. - answer-✔divide the cell
The above image is of the chromosomes of a female chicken, or hen. 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. Given the pedigree above, choose the letter of the correct answer. The trait 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 (answer "identical" or "nonidentical") after mitosis __
Daughter cells are (answer "identical" or "nonidentical") 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 using pea plants was helpful to Gregor Mendel in his studies
of inheritance. - answer-✔many pea varieties were available
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