Ask a New Question
Menu

The presence of alleles A, B represents dominant genes for color and according to the Punnet Square, produces more puppies with this color phenotype. Item 13 Item 14 AB Ab aB ab Item 15 AB AABB AABb AaBB AaBb K Item 16 black black black black Item 17 Ab AABb AAbb AaBb Aabb Item 18 Item 19 black brown black brown < Item 20 aB AaBB AaBb aaBB aaBb (1 point) O Black Yellow O Brown O White black black yellow yellow ab AaBb Aabb aaBb aabb black brown yellow white

1 answer

It looks like you are working with a Punnett square to analyze the inheritance of coat color in puppies based on the alleles A and B. Based on your provided information, it seems that A and B are dominant alleles resulting in a black phenotype, while recessive alleles might produce brown or yellow phenotypes.

To clarify your findings, let’s examine the Punnett square you provided:

  1. Parent Genotypes: The letters seem to represent different combinations of alleles from two parents. Assuming both parents have the dominant genes for color (A or B), you can get various combinations.

  2. Punnett Square Breakdown:

    • The offspring combinations from the cross you provided seem to yield a mix of phenotypes.
    • If we assume "A" and "B" are responsible for black coat color, and lower-case "a" and "b" correspond to brown or yellow coats, then:
      • AA, AB, and other combinations with at least one uppercase letter (like AABB, AABb, AaBB, etc.) would result in black puppies.
      • Only the "aabb" genotype (homozygous recessive) would produce a phenotype of a different color than black.

  3. Puppy Color Outcomes:

    • From the combinations:
      • If all combinations result in black puppies except for the one leading to "aabb," you would see a predominance of black puppies.
      • The ratios can help you predict how many puppies would potentially be black versus brown or yellow.

  4. Conclusion:

    • Without exact ratios, you could deduce that if the dominant alleles are present, you'll likely produce mostly black puppies (as per dominancy), with a smaller number of brown or yellow depending on the recessive combinations.

In summary, it seems you are analyzing inheritance patterns in dog coat color through a Punnett square, with dominant alleles leading to black color. If you need a specific question answered about the analysis or additional details on phenotype ratios, feel free to ask!