Heredity ❮ 111Pick the answer that most likely represents the rela-
tive positions of the five genes.
- Imagine that in squirrels, gray color (G) is domi-
nant over black color (g). A black squirrel has the
genotype gg. Crossing a gray squirrel with which
of the following would let you know with the
most certainty the genotype of the gray squirrel?
A. GG
B. Gg
C. gg
D. Cannot be determined from the information
given - From a cross of AABbCC with AaBbCc, what is
the probability that the offspring will display a
genotype of AaBbCc?
A. 1 ⁄ 2
B. 1 ⁄ 3
C. 1 ⁄ 4
D. 1 ⁄ 8
E. 1 ⁄ 16
Use the following pedigree of an autosomal recessive
condition for questions 4–6.
- What is the genotype of person A?
A. Bb
B. BB
C. bb
D. Cannot be determined from the given
information - What is the most likely genotype of person B?
A. Bb
B. BB
C. bb
D. Cannot be determined from the information
given - What is the probability that persons C and D
would have a child with the condition?
A. 1 ⁄ 2
B. 1 ⁄ 4
C. 1 ⁄ 6
D. 1 ⁄ 8
E. 1 ⁄ 10 - Which of the following disorders is X-linked?
A. Tay-Sachs disease
B. Cystic fibrosis
C. Hemophilia
D. Albinism
E. Huntington disease - A court case is trying to determine the father of
a particular baby. The mother has type O blood,
and the baby has type B blood. Which of the fol-
lowing blood types would mean that the man
was definitely notthe father of the baby?
A. B and A
B. AB and A
C. O and B
D. O and A
E. None can prove conclusively
A. |------|------------|------------|------------------|
E A D C B
B. ------|------------|------------|------------------|
A E C D B
C. ------|| ------------|------------|------------------|
EA C D B
D. ------------|| ------------|------|------|
B C D E A
E. ------|| ------|------------|------------------|
AE D C B
|A
B C D
?
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