Answer:

n a monohybrid cross between a tall purebred (TT) pea plant and a short purebred (tt) pea plant, where tallness is dominant (T) and shortness is recessive (t), the Punnett square would look like this:

Explanation:

In a monohybrid cross between a tall purebred (TT) pea plant and a short purebred (tt) pea plant, where tallness is dominant (T) and shortness is recessive (t), the Punnett square would look like this:

|  T   |   t   |

T | TT | Tt |

t | Tt | tt |

The resulting genotypes and phenotypes would be as follows:

Genotypes:

25% of the offspring would be homozygous dominant (TT) and would be tall.

50% of the offspring would be heterozygous (Tt) and would also be tall.

25% of the offspring would be homozygous recessive (tt) and would be short.

Phenotypes:

75% of the offspring would have the tall phenotype.

25% of the offspring would have the short phenotype.