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Taylor swift and travis kelce are looking to get some insight into any potential future offspring. They completed the punnett square to determine potential hair and eye color combinations. Taylors gametes are on the left side of the square, travis' are along the top. In this senario, Taylor has blue eyes and blomde hair, while travis has brown eyes and brown hair.

Brown hair = B
Blonde hair = b
Brown eyes = W
Blue eyes = w

what percentage of their offspring will have blue eyes AND brown hair

1 answer

To solve this problem, we can set up a Punnett square based on the alleles for hair and eye color. Taylor's genotypes for blue eyes (w) and blonde hair (b) are homozygous (bb, ww), while Travis's genotypes for brown eyes (W) and brown hair (B) are also homozygous (BB, WW).

Taylor's genotype:

  • Hair: bb (blonde)
  • Eyes: ww (blue)

Travis's genotype:

  • Hair: BB (brown)
  • Eyes: WW (brown)

Now, we can create a Punnett square for hair color and a separate one for eye color.

For Hair Color:

| | B | B | |----------|-----------|-----------| | b | Bb (brown)| Bb (brown)| | b | Bb (brown)| Bb (brown)|

From this, we see that all offspring will have the genotype Bb, resulting in 100% brown hair.

For Eye Color:

| | W | W | |----------|-----------|-----------| | w | Ww (brown)| Ww (brown)| | w | Ww (brown)| Ww (brown)|

From this, we see that all offspring will have the genotype Ww, resulting in 100% brown eyes.

Summary of Offspring Traits

  • Hair Color: 100% brown (Bb)
  • Eye Color: 100% brown (Ww)

Conclusion

Since all offspring will be Bb for hair (brown) and Ww for eyes (brown), there will be 0% of their offspring with blue eyes and brown hair, because all will have brown eyes.