April 4 Q 1 TH Morgan and his colleagues worked out a set of symbols to represent fly genotypes Which of the following are representative AaBb AaBb 46 XY or 46 XX ID: 560744
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Slide1
Bio 130 – Quiz April 4Slide2
Q. 1 – T.H. Morgan
and his colleagues worked out a set of symbols to represent fly genotypes. Which of the following are representative?
AaBb
×
AaBb
46, XY or 46, XX
vg+vgse+se
×
vgvgsese
+2 × +3
I
A
I
B
× I
A
I
ASlide3
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?
This mutation occurs in all offspring of a male with the mutation.
This mutation occurs in all male but no female offspring of a male with the mutation.
This mutation occurs in all offspring of a female with the mutation.
This mutation occurs in all male but no female offspring of a female with the mutation.
This mutation occurs in all offspring of both males and females with the mutation.Slide4
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?¾
3/8
9/16
9/32
9/64Slide5
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?
½
¼
1/8
1/161