Answer:
In a Punnett's square the alleles of all the male gametes are entered in the top of the chart (option a).
Explanation:
Punnett square was designed to plot the allele crosses of the parental generation and observe the probable combinations of the alleles in the offspring, for a given characteristic.
Conventionally, in a Punnett square or chart, the father's alleles are placed at the top, the mother's alleles are placed in the left column and the results in the offspring are shown in the boxes, resulting from the intersection of the data.
