Question

In: Biology

In Drosophila, red eyes (E) are dominant over white (e) and normal wings (W) are dominant...

In Drosophila, red eyes (E) are dominant over white (e) and normal wings (W) are dominant over shriveled wings (w). Use the addition and multiplication rules to calculate the phenotypic ratios of the cross of Eeww and EeWw.

1. Cross of Ee x Ee:

2. Cross of ww x Ww:

3. Red eyes and normal wings:

4. Red eyes and shriveled wings:

5. White eyes and normal wings:

6. White eyes and shriveled wings:

Expert Solution

E - Red eyes (dominant)

e - White eyes (recessive)

EE - Red eyes

Ee - Red eyes

ee - White eyes

W - Normal wings (dominant)

w - shriveled wings (recessive)

WW - Normal wings

Ww - Normal wings

ww - Shriveled wings

cross of Eeww and EeWw

Ew x EW --> EEWw (Red eyes and normal wings)

Ew x Ew --> EEww (Red eyes and shriveled wings)

Ew x eW--> EeWw (Red eyes and normal wings)

Ew x ew --> Eeww (Red eyes and shriveled wings)

ew x EW --> EeWw (Red eyes and normal wings)

ew x Ew --> Eeww (Red eyes and shriveled wings)

ew x eW--> eeWw (White eyes and normal wings)

ew x ew --> eeww (White eyes and shriveled wings)

1. Cross of Ee x Ee --> EE : Ee : ee = 1:2:1

phenotypic ratio, Red eye: white eye= 3:1

2. Cross of ww x Ww --> Ww : ww = 2:2

Phenotypic ratio, normal wings: shriveled wings=1:1

3. Red eyes and normal wings: 3

4. Red eyes and shriveled wings: 3

5. White eyes and normal wings: 1

6. White eyes and shriveled wings: 1

gladiator answered 1 year ago

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