toltecavsmaya
Answered

Discover a world of knowledge at Westonci.ca, where experts and enthusiasts come together to answer your questions. Connect with professionals ready to provide precise answers to your questions on our comprehensive Q&A platform. Our platform provides a seamless experience for finding reliable answers from a network of experienced professionals.

In cocker spaniels the allele for a black coat color (B) is dominant over the allele for a brown coat color (b). If a brown cocker spaniel is crossed with a heterozygous black cocker spaniel, which of the following genotypic ratios can be expected?



0 BB: 2 Bb: 2 bb






1 BB: 2 Bb: 1 bb






2 BB: 0 Bb: 2 bb






2 BB: 1 Bb: 0 b



Sagot :

The first one .....  0 BB: 2 Bb: 2 bb  use punnett squares it helps, just search how to use them.
ajeigbeibraheem

The expected genotypic ratios are  0BB: 2Bb : 2bb. The 1st option is correct.

The Mendelian theory by George Mendel explains the monohybrid experiment crossing which can be achieved by the use of punnet square.

From the given information, in cocker spaniels

  • The allele for black coat color = B
  • The allele for brown coat color = b

If a brown cocker spaniel i.e bb (recessive trait) is crossed with a heterozygous black cocker spaniel i.e. Bb

Then, we can use the punnet square to determine their genotypes.

        b            b

B      Bb          Bb

b      bb           bb

Therefore, we can conclude that the genotypic ratios are 0BB: 2Bb : 2bb

Learn more about monohybrid crossing here:

https://brainly.com/question/24076691?referrer=searchResults

Thank you for your visit. We're committed to providing you with the best information available. Return anytime for more. We appreciate your time. Please come back anytime for the latest information and answers to your questions. Westonci.ca is here to provide the answers you seek. Return often for more expert solutions.