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
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
