the question is what % of the offspring will be round ? anf the letters are (Rr x rr) and then a square
To determine the percentage of offspring that will be round in a cross between parents with the genotypes Rr and rr, we need to understand the principles of inheritance and genetic traits.
In this case, the genotype Rr represents a hybrid individual, meaning it has one dominant allele (R) and one recessive allele (r) for the specific trait being considered. On the other hand, the genotype rr represents an individual that is homozygous recessive, meaning it has two copies of the recessive allele.
To determine the percentage of offspring that will be round, we need to know the mode of inheritance for this trait. Specifically, we need to know if it follows a dominant-recessive pattern or if it is influenced by other factors, such as codominance or incomplete dominance.
Assuming that the trait follows a simple dominant-recessive pattern, where the allele for roundness (R) is dominant over the allele for non-roundness (r), the possible genotypes and corresponding phenotypes for the offspring from this cross can be represented in a Punnett square.
A Punnett square is a visual tool used to predict the possible genotypes and phenotypes of offspring when two individuals are crossed. In this case, the Punnett square would look like this:
r r
R Rr Rr
Each box in the Punnett square represents a possible offspring genotype resulting from the combination of the mother's alleles (Rr) and the father's alleles (rr).
By examining the Punnett square, we can see that all of the offspring will have the genotype Rr, which means they will have the dominant allele for roundness (R). Therefore, the percentage of offspring that will be round is 100%.
To summarize, for a cross between parents with genotypes Rr (hybrid) and rr (homozygous recessive), all the offspring will have the genotype Rr and will exhibit the round phenotype. Thus, the answer to the question is that 100% of the offspring will be round.