The white eye mutation studied by Thomas Hunt Morgan is X-linkedand recessive to wild-type red eyes. When true-breeding white-eyedmales carrying the white mutation were crossed with true-breedingpurple-eyed females, all the F1 progeny had wild-type (red) eyes.When the F1 progeny were intercrossed, the F2 progeny emerged inthe 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 eyecolors and match the correct genotype with each individual listedbelow.
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
The white eye mutation studied by Thomas Hunt Morgan is X-linkedand recessive to wild-type red eyes. When true-breeding white-eyedmales carrying the white mutation were crossed with true-breedingpurple-eyed females, all the F1 progeny had wild-type (red) eyes.When the F1 progeny were intercrossed, the F2 progeny emerged inthe 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 eyecolors and match the correct genotype with each individual listedbelow.
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
Related textbook solutions
Related questions
Genetics In a hypothetical insect species, eye color may be purple or red, and wings may be long or short. The following table shows the results of two crosses where the parents were obtained from a mixed population that did not breed true.
| Parents | Progeny | |
| Cross 1 | Red long male Red, long female | Males: one half red, long; one half purple long Females: all red, long |
| Cross 2 | Red short male Purple long female | Males, all purple short Females: all red eyed, short |
What is the mode of inheritance for eye color for this insect?
What is the mode of inheritance for wing size?
Assuming that true breeding lines are used which of the following crosses would produce an F2 generation that confirms the mode of inheritance for both traits?
Purple short male X red long female
Red short male X red short female
What phenotypic ratio would you expect to see in the F2 generation?
males: 9/16 red, short; 3/16 purple, short; 3/16 red, long; 1/16 purple, long; females: 9/16 red, short; 3/16 purple, short; 3/16 red, long; 1/16 purple, long
males: 3/4 red, short; 1/4 red, long; females: 3/8 red, short; 3/8 purple, short; 1/8 red, long; 1/8 purple, long
males: 3/8 red, short; 3/8 purple, short; 1/8 red, long; 1/8 purple, long; females: 3/8 red, short; 3/8 purple, short; 1/8 red, long; 1/8 purple, long
males: 3/8 red, short; 3/8 purple, short; 1/8 red, long; 1/8 purple, long females: 3/4 red, short; 1/4 red, long
