Chapter 12 – Patterns of Inheritance
56. Before Mendel’s experiments with pea plants, which ideas formed the basis for most
thinking about heredity? Check all that apply.
_____ species gradually change over time
57. A scientist has an uncharacterized pea plant. She wants to determine the plant’s genotype
for seed color. In order to be certain that she will get conclusive results from a single cross,
with what plant could she cross it? Check all that apply.
Chapter 12 – Patterns of Inheritance
Clarify Question
•
What is the key concept addressed by the question?
•
What type of thinking is required?
•
What key words does the question contain?
Gather Content
•
What do you already know about testcrosses?
Consider Possibilities
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 12 – Patterns of Inheritance
58. Pedigrees are useful to geneticists because they can help determine: Check all that
apply.
Multiple Choice Questions
59. You toss a coin twice. Because the outcome of the first toss does not affect the outcome of the second toss, these 2
events are called
60. If you are tossing a six-sided die, what is the probability of getting either a 1 or a 2 on
your first toss AND a 1 or a 2 on your second toss?
Chapter 12 – Patterns of Inheritance
Clarify Question
•
What is the key concept addressed by the question?
•
What type of thinking is required?
•
What key words does the question contain?
Gather Content
•
What do you already know about probability?
Consider Possibilities
•
What other information is related to the question? Which information is most useful?
Choose Answer
Chapter 12 – Patterns of Inheritance
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Numeric Response Questions
61. In mice, the allele for black fur is dominant to the allele for brown fur. If a male
heterozygous black mouse is crossed with a female brown mouse, what percentage of the F1
offspring do you predict will be homozygous? ( Enter the number only without the percent
sign. For example, enter 100% as 100 and enter 12.5% as 12.5 )
Chapter 12 – Patterns of Inheritance
Clarify Question
•
What is the key concept addressed by the question?
•
What type of thinking is required?
•
What key words does the question contain?
Gather Content
•
What do you already know about crosses and genotype ratios?
Consider Possibilities
•
What other information is related to the question? Which information is most useful?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 12 – Patterns of Inheritance
Multiple Choice Questions
62. In humans, the sickle-cell trait is caused by a single defective allele, but sickle-cell
disease only occurs in individuals that are homozygous for the sickle-cell allele. A man and
woman each carry the trait, but do not have sickle-cell disease. What is the probability that
their first two children will both have sickle-cell disease?
Chapter 12 – Patterns of Inheritance
Clarify Question
•
What is the key concept addressed by the question?
•
What type of thinking is required?
•
What key words does the question contain?
Gather Content
•
What do you already know about monohybrid crosses? About determining the probability
of two independent events?
Consider Possibilities
•
What other information is related to the question? Which information is most useful?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
Chapter 12 – Patterns of Inheritance
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Type: Quantitative Reasoning
Numeric Response Questions
63. In watermelons, the gene for green color is dominant over its allele for striped color. At
another gene locus, the gene for short shape is dominant over its allele for long shape. These
two allele pairs assort independently. If a plant with long, striped fruit is crossed with a plant
that is heterozygous for both of these traits, what percentage of the offspring do you expect
will be short and green? ( Enter the number only without the percent sign. For example, enter
100% as 100 and enter 12.5% as 12.5 )
Chapter 12 – Patterns of Inheritance
Clarify Question
•
What is the key concept addressed by the question?
•
What type of thinking is required?
•
What key words does the question contain?
Gather Content
•
What do you already know about two-gene crosses and independent assortment?
Consider Possibilities
•
What other information is related to the question? Which information is most useful?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
Chapter 12 – Patterns of Inheritance
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Multiple Choice Questions
64. In rabbits, there is a gene that controls ear length, with a dominant allele “T” for long ears
and a recessive allele “t” for short ears. At another gene locus, there are alleles “B” for black
coat and “W” for white coat. Neither the B or W allele is dominant, and BW produces a gray
coat. These two allele pairs assort independently. If a gray rabbit that is heterozygous at the
gene locus controlling ear length is mated with a white rabbit that is also heterozygous at the
gene locus controlling ear length, what is the probability that their first offspring will be gray
with long ears?
Chapter 12 – Patterns of Inheritance
Clarify Question
•
What is the key concept addressed by the question?
•
What type of thinking is required?
•
What key words does the question contain?
Gather Content
•
What do you already know about two-gene crosses and independent assortment?
Consider Possibilities
•
What other information is related to the question? Which information is most useful?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?