To achieve a production with all large eggs and strong shells, you need to cross chickens with specific genotypes. Here's the breakdown of the options provided:
A. GGRR x GgRr:
- In this cross, both parents have dominant alleles for large egg size (G) and strong shells (R). This combination increases the likelihood of offspring having these desired traits.
B. GgRr x ggrr:
- The second parent in this cross has only recessive alleles for small egg size (g) and weak shells (r), which can result in offspring with varied traits, including small eggs and weak shells. Therefore, this cross may not consistently produce the desired characteristics.
C. GgRr x GgRr:
- Both parents in this cross carry a combination of dominant and recessive alleles for egg size and shell strength. This mix can lead to offspring with a range of traits, including some that meet the desired criteria and some that do not.
D. GGRr x GgRr:
- This cross involves one parent with a dominant genotype for large eggs and strong shells and another with a mix of dominant and recessive alleles. While it may produce some offspring with the desired traits, there is also a chance of variability in the results.
Based on the analysis, option A (GGRR x GgRr) is the most likely to yield a production where all eggs are large and have strong shells because both parents have dominant alleles for these traits, increasing the chances of the offspring inheriting these characteristics consistently.
