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marin [14]
3 years ago
12

If flies that are heterozygous for both the bent wing gene and the vestigial wing gene are mated, what is the probability of off

spring with bent wings only?
a. 1/8
b. 3/8
c. 1/4
d. 9/16
e. 3/16
Biology
1 answer:
boyakko [2]3 years ago
5 0
E.3/16 
Vg: normal wings; vg: vestigial wings  
Bt: normal wings, bt: bent wings  
But to simplify, I write:  
V: normal wing; v: vestigial wing  
B: normal wings; b: bent wings   
P: VvBb x VvBb  
Gametes (both) VB, Vb, vB, vb  
F1 (Punnett Square)  
.....|.... VB...|...Vb...|...vB...|..vb  
VB | VVBB | VVBb | VvBB | VvBb  
Vb | VVBb .| VVbb | VvBb | Vvbb  
vB | VvBB ..| VvBb | vvBB | vvBb 
 vb | VvBb ..| Vvbb. | vvBb | vvbb 
 Phenotypic ratio: 9/16 V-B- (normal) : 3/16 V-bb (bent) : 3/16 vvB- (vestigial) : 1/16 vvbb (vestigial-bent)
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