Chapter 11 Assessment
that there is a 3
sunny on any given a
a person's birthda
loudy Tuesday?
28. Problem Solving Suppose that th
probability that it will be sunny on
What is the probability that a person
the vear 2010 will fall on a cloudy Tues
29. Interpreting Graphics Genes th
or feather color in some animals are
differently in the winter than in the
might such a difference in expression be
cial to the ptarmigan shown below?
Genes that control
nimals are expressed
han in the summer. H
expression be bene
Critical Thinking
21. Designing Experiments in sheep, the allele for
white wool (A) is dominant over the allele for
black wool (a). How would you determine the
genotype of a white ram, or male sheep?
22. Inferring Explain why horse breeders will pay a
lot of money to breed one of their horses with a
horse that has won the Kentucky Derby.
23. Formulating Hypotheses Suppose you found
out that a mating between a black rabbit and a
brown rabbit produced all black offspring. Propose
a hypothesis to explain the color of the offspring.
24. Comparing and Contrasting Design and
complete a table to compare and contrast meiosis
and mitosis.
25. Applying Concepts In dogs, the allele for short
hair is dominant over the allele for long hair. Two
short-haired dogs are the parents of a litter of
eight puppies. Six puppies have short hair, and
two have long hair. What are the genotypes of
the parents?
26. Applying Concepts In guinea pigs, the allele for
a rough coat (R) is dominant over the allele for a
smooth coat (1). A heterozygous guinea pig (Rr)
and a homozygous recessive guinea pig (rr) have a
total of nine offspring. The Punnett square for this
cross shows a 50 percent chance that any particu-
lar offspring will have smooth coats. Explain how
all nine offspring can have smooth coats.
30. Making Connections In what step of a scien!
tific method would you use a Punnett square?
Performance-Based Assessment
Creative Writing You are a writer for a TV station
The producer asks you to write a series that takes the
viewer on an imaginary voyage back in time. Each
week, a famous person in history will be visited. The
show is designed to provide insight into the work of
the person being interviewed and to give the viewe
feel for the events of that era. The first person you
will be Gregor Mendel. Write a script for this prog
Rr
Take it to the NET
Prentice Hall Web site at
what this phrase
ics. Then, answer the follo
27. Inferring Suppose Mendel crossed two pea
plants and got both tall and short offspring. What
could have been the genotypes of the two
original plants? What genotype could not have
Have you ever heard the phrase "a horse or
different color?" Visit the Prentice Hall
www. phschool. com to find out what this
means in terms of genetics. Then, an
ing questions:
How is the color of a horse's coat determ
• What does the W gene control? The
• What will a horse that is genotype
• If a mare with the genotype w
WWEE stallion, what proportion of th
the ability to form black hair?
oat determined?
been present?
ene control? The E gene?
olype wwEE look like
e is crossed with
on of the foals will
284 Chapter 11