Final answer:
A Punnett square can be used to determine the genotypes and phenotypes of offspring in a genetic cross. In the given cross of wwdd and wwdd, all offspring will have the genotype wwdd. To calculate the probability of at least 2 out of 10 offspring having the wd phenotype, we use the binomial probability formula and add up the probabilities of 2 or more offspring with the phenotype.
Step-by-step explanation:
A Punnett square is a useful tool to determine the possible genotypes and phenotypes of offspring in a genetic cross. To draw a Punnett square for the given cross between the genotypes wwdd and wwdd, we list the possible genotypes of the gametes for each parent and combine them in the square. Since both parents have the same genotype, the Punnett square will show only one genotype, wwdd, for all offspring.
Regarding the probability that at least 2 out of 10 offspring will have the phenotype wd, we need to calculate the probability of getting 2, 3, 4, 5, 6, 7, 8, 9, or 10 offspring with the wd phenotype and add them up. To calculate each probability, we use the binomial probability formula: P(k) = (n C k) * p^k * (1-p)^(n-k), where n is the number of trials (10), k is the number of successful outcomes (2 or more), p is the probability of a successful outcome (1/4 in this case since there is a 1/4 chance of getting the wd phenotype), and (n C k) is the binomial coefficient. By calculating the probabilities for 2 or more offspring with the wd phenotype and adding them up, we can determine the overall probability.