Question

a brown rabbit with long ears, bbll, is crossed with a white rabbit with long ears, bbll. the brown allele, b, is dominant fur - color allele, and the long - eared allele, l, is the dominant ear length allele. using the provided information in the previous sentence, select the punnett square boxes that should contain offspring that are white with short ears.

Explanation:

Step1: Determine the genotype for white - short ears

The white fur color is recessive, so the genotype for fur color must be $bb$. The short - ear trait is recessive, so the genotype for ear length must be $ll$. So the desired genotype of the offspring is $bbll$.

Step2: Analyze the Punnett square

We need to find the combination of gametes that will result in $bbll$. The gametes from $BbLl$ are $BL$, $Bl$, $bL$, $bl$ and from $bbLl$ are $bL$, $bl$. The only way to get $bbll$ is when a $bl$ gamete from $BbLl$ combines with a $bl$ gamete from $bbLl$.

Answer:

The box where the $bl$ (from the top - row gametes of $BbLl$) and $bl$ (from the left - column gametes of $bbLl$) combine.