In a Punnett Square parent alleles are written Outside of the boxes (top and left side).
The Punnett square is a table in which all of the possible outcomes for a genetic cross between two individuals with known genotypes are given.
A genotype is the genetic makeup of the organism. This is shown by the three genetic conditions described earlier (BB, Bb, bb). The phenotype is the trait those genes express.
Hence, C is correct option
To learn more about Punnett square, here
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