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30 Mar 2018
Assume that investigators crossed a strain of flies carrying thedominant eye mutation Lobe on the second chromosome with a strainhomozygous for the second chromosome recessive mutations smoothabdomen and straw body. The F1 Lobe females were then backcrossedwith homozygous smooth abdomen, straw body males and the followingphenotypes were observed:
smooth abdomen, straw body 820
Lobe 780
smooth abdomen, Lobe 42
straw body 58
smooth abdomen 148
Lobe, straw body 152
(a) Give the gene order and map units between these three loci -draw the map!.
(b) What is the coefficient of coincidence?
Assume that investigators crossed a strain of flies carrying thedominant eye mutation Lobe on the second chromosome with a strainhomozygous for the second chromosome recessive mutations smoothabdomen and straw body. The F1 Lobe females were then backcrossedwith homozygous smooth abdomen, straw body males and the followingphenotypes were observed:
smooth abdomen, straw body 820
Lobe 780
smooth abdomen, Lobe 42
straw body 58
smooth abdomen 148
Lobe, straw body 152
(a) Give the gene order and map units between these three loci -draw the map!.
(b) What is the coefficient of coincidence?
28 Sep 2023
