Consider the following linked traits in fruit flies: V= vermillion eyes (v+ is red eyes) cv = crossveinless wings (cv+ have crossveins) ct = cut wing margins (ct+ have uncut margins) You perform the following cross: v+v+ cv+cv+ ct+ct+ x vv cvcv ctct You then cross an F1 fly with a fly recessive for all three traits: v+v cv+cv ct+ct x vv cvcv ctct These are the offspring you observed from this cross: Red, crossveins, uncut 580 Vermillion, crossveinless, cut 592 Red, crossveinless, cut 89 Vermillion, crossveins, uncut 94 Red, crossveinless, uncut 45 Vermillion, crossveins, cut 40 Red, crossveins, cut 3 Vermillion, crossveinless, uncut 5 Draw a map of these 3 genes on the fly chromosome they inhabit.
Consider the following linked traits in fruit flies:
V= vermillion eyes (v+ is red eyes)
cv = crossveinless wings (cv+ have crossveins)
ct = cut wing margins (ct+ have uncut margins)
You perform the following cross:
v+v+ cv+cv+ ct+ct+ x vv cvcv ctct
You then cross an F1 fly with a fly recessive for all three traits:
v+v cv+cv ct+ct x vv cvcv ctct
These are the offspring you observed from this cross:
|
Red, crossveins, uncut |
580 |
|
Vermillion, crossveinless, cut |
592 |
|
Red, crossveinless, cut |
89 |
|
Vermillion, crossveins, uncut |
94 |
|
Red, crossveinless, uncut |
45 |
|
Vermillion, crossveins, cut |
40 |
|
Red, crossveins, cut |
3 |
|
Vermillion, crossveinless, uncut |
5 |
Draw a map of these 3 genes on the fly chromosome they inhabit.
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