Can someone draw the punnet square and help explain this
question
Homework Answers
Let XS is dominant over Xs. XS encodes straight bristle and it is dominant over forked bristle.
Let R genes encodes red eye colot and it is dominant over r allele. r allele in homozygous recessive condition produces purple eye color
Parents: XSXs/ Rr (female) × XsY / rr
Punnet square:
| Gametes | Xs /r | Y/r |
| XS/R | XSXs/ Rr ( Straight, Red) daughter | XSY/ Rr ( straight, Red) son |
| XS/r | XSXs/rr ( straight, purple) daughter | XSY / rr ( straight, purple) son |
| Xs/R | XsXs/ Rr ( forked, red) daughter | XsY/Rr ( forked, red) son |
| Xs/r | XsXs/ rr ( forked, purple) daughter | XsY/rr ( forked, purple) son |
As you seen that 1 out of 4 daughters have forked bristle and purple eye.
That's why percentage of daughter having forked bristle and purpel eye is (1/4)×100=25%
Right answers is 25% ( D).
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Can someone draw the punnet square and help explain this
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