Bio Principles Final Questions and Correct Answers | Latest Update
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Bio
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Bio
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 eq...
Best Grades | Must Pass | Latest Update | Correct Answers | 2024/ 2025
Bio Principles Final Questions and Correct
Answers | Latest Update
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)
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%)
a. BT, Bt, bT, bt
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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)
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.
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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
__
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 __
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.
a. Nondisjunction is when sister chromatids fail t o separate properly
during meiosis
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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.
a. angiosperm
b. mitochondria
c. female
Three steps are required for successful reproduction in all cells, regardless of domain. Give
one of these steps.
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
karyotype, autosomes, sex
a. Given the pedigree above, choose the letter of the correct answer. The trait in question is:
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