Question

Evaluating Dihybrid Cross
Two fruit flies that are heterozygous for body color and eye color are crossed. Brown body color is dominant to black body color. Red eye color is dominant to brown eye color.

Determine the genotypes of offspring 1-8.
1
2
3
4
5
6
7
8

Answer 1

I don’t have the diagram or which boxes are labeled 1–8, so I’m not sure how your offspring are numbered. Could you upload or describe the Punnett square (which boxes 1–8 refer to)?

Meanwhile, here is the complete 4×4 Punnett square for the cross BbEe × BbEe (parents heterozygous for body color and eye color). I use B = brown body (dominant), b = black body (recessive), E = red eyes (dominant), e = brown eyes (recessive). Parental gametes: BE, Be, bE, be.

Full list of the 16 offspring genotypes (and phenotype in parentheses):

1. BBEE — brown body, red eyes
2. BBEe — brown body, red eyes
3. BbEE — brown body, red eyes
4. BbEe — brown body, red eyes
5. BBEe — brown body, red eyes
6. BBee — brown body, brown eyes
7. BbEe — brown body, red eyes
8. Bbee — brown body, brown eyes
9. BbEE — brown body, red eyes
10. BbEe — brown body, red eyes
11. bbEE — black body, red eyes
12. bbEe — black body, red eyes
13. BbEe — brown body, red eyes
14. Bbee — brown body, brown eyes
15. bbEe — black body, red eyes
16. bbee — black body, brown eyes

If you tell me which boxes correspond to offspring 1–8 (or paste the image/text of the square), I’ll map those numbers to the genotypes above.