The white eye mutation studied by Thomas Hunt Morgan is X-linked and recessive t
ID: 48225 • Letter: T
Question
The white eye mutation studied by Thomas Hunt Morgan is X-linked and recessive to wild-type red eyes. When true-breeding white-eyed males carrying the white mutation were crossed with true-breeding purple-eyed females, all the F1 progeny had wild-type (red) eyes. When the F1 progeny were intercrossed, the F2 progeny emerged in the following ratio:
3/8 wild-type females
1/4 white-eyed males
3/16 wild-type males
1/8 purple-eyed females
1/16 purple-eyed males.
Formulate a hypothesis to explain the inheritance of these eye colors and match the correct genotype with each individual listed below.
P Generation Male:
P Generation Female:
F1 Generation Male
F1 Generation Female:
F2 Generation Purple-eyed Female
F2 Generation White-eyed Male
F2 Generation Wild-type Male:
F2 Generation Purple-eyed Male:
F2 Generation Wild-type Female:
Options:
w+/Y; p+/_
w/Y;_ _
w+/_; p/p
w+/Y;p+/p
w+/_;p+_
w/Y; p+/p+
w+/W+; p/p
w+/Y; p/p
Explanation / Answer
suppose w represent the white color and w+respresent te red color
then
P generation male will be w/y white color recessive male
p generation female will be w+/_;p+_
f1 generation male will be w+/Y; p+/_
f1 generation female will be w+/_; p/p
F2 Generation Purple-eyed Female w+/_;p+_
F2 Generation White-eyed Male w/Y; p+/p+
F2 Generation Wild-type Male:w+/W+; p/p
F2 Generation Purple-eyed Male:w+/Y; p/p
F2 Generation Wild-type Female:w+/W+; p/p
all these answers are given considering the nature of dominance in the alleles. assumption is written on the top.
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