In an Amazonia beetle purple color is caused by an Xlinked a
In an Amazonia beetle, purple color is caused by an X-linked allele; the other allele at this locus causes green color. The female heterozygote has green and purple spots due to X-inactivation. What kinds of offspring would you expect form the cross of a spotted female and a green male
a.
purple or green females; purple or green males
b.
spotted or purple females; spotted or purple males
c.
spotted or green females; purple or green males
d.
only green females; only purple males
e.
spotted or purple females; purple or green males
Solution
(purple spotted female) Pp X (Green male) Gg
The offspring obtained from above cross are spotted or purple females and purple or green males. The option e is correct.
| male/ female | PG | Pg | pG | pg | 
| PG | PPGG | PPGg | PpGG | PpGg | 
| Pg | PPGg | PPgg | PpGg | Ppgg | 
| pG | PpGG | PpGg | ppGG | ppGg | 
| pg | PpGg | Ppgg | ppGg | ppgg | 

