Biology 251 - Genetics » Fall 2020 » Quiz 2

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Question #1
In sheep, lustrous fleece results from an allele (L) that is dominant over an allele (l) for normal fleece. An adult female with lustrous fleece is mated with an adult male with normal fleece. The single offspring has normal fleece. What are the genotypes of the parents?
A.   ll,  Ll
B.   Ll,  ll 
C.   LL,  Ll
D.   LL,  ll
E.   Ll,  Ll
Question #2
In a study on the genetic basis of yellow coat color in mice, a yellow mouse crossed with a yellow mouse led to 260 yellow mice and 105 non-yellow mice. You are expecting a 3:1 ratio of yellow: non-yellow. Use a Chi Squared analysis to determine if the principle of segregation is followed. Select one:
A.   Chi Squared = 2.8, df=2, no
B.   Chi Squared = 8.4, df=1, yes
C.   Chi Squared = 2.8, df=2, yes
D.   Chi Squared = 8.4, df=2, no
E.   Chi Squared = 2.8, df=1, yes 
F.   Chi Squared = 8.4, df=1, no

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