Final answer:
The assertion that a Punnett square predicted 75% of offspring would have black fur, with actual results being very close, is false. It is dependent on the specific cross examined, and actual percentages may vary from predictions.
Step-by-step explanation:
The statement that the Punnett square predicted that 75% would have black fur but the actual percentage is very close is False . According to the information provided, the Punnett square shows a cross between two heterozygous individuals (Bb), which would result in approximately 75% of offspring displaying the dominant phenotype (if B represents the dominant allele for black fur), not necessarily the actual color black. In the given scenarios, C and D, we see different predictions: 50% speckled, 25% black, and 25% white in scenario C, and 50% black and 50% white in scenario D. Therefore, the actual percentage of the offspring having black fur should align with one of these scenarios, not 75%. Furthermore, the Punnett square is a predictive tool, and actual results may vary slightly due to chance, particularly in smaller sample sizes.