Bio 130 – Quiz April 4
Q. 1 – T.H. Morgan and his colleagues worked
out a set of symbols to represent fly genotypes.
Which of the following are representative?
A.
B.
C.
D.
E.
AaBb × AaBb
46, XY or 46, XX
vg+vgse+se × vgvgsese
+2 × +3
IA IB × IA I A
Q. 2 - In some Drosophila species there are genes on the Y
chromosome that do not occur on the X chromosome. Imagine that a
mutation of one gene on the Y chromosome reduces the size by half
of individuals with the mutation. Which of the following statements
is accurate with regard to this situation?
A. This mutation occurs in all offspring of a male with the
mutation.
B. This mutation occurs in all male but no female offspring of a
male with the mutation.
C. This mutation occurs in all offspring of a female with the
mutation.
D. This mutation occurs in all male but no female offspring of a
female with the mutation.
E. This mutation occurs in all offspring of both males and
females with the mutation.
Q. 3 - In cocker spaniels solid coat color is dominant over spotted
coat color. If two heterozygous dogs were crossed to each other,
what would be the probability of having a litter of 3 pups, 2 with
solid coats and one with a spotted coat?
A.
B.
C.
D.
E.
¾
3/8
9/16
9/32
9/64
Q. 4 – Two human parents with normal skin
pigmentation have an albino child. What is the
probability that their next child will be an albino too?
A.
B.
C.
D.
E.
½
¼
1/8
1/16
1