In the Punnett square shown, which of the following is true about the offspring resulting from the cross?

T = tall
t= short

a
all offspring will be short
b
all offspring will be tall
c
all offspring will be homozygous tall
d
all offspring will be heterozygous short

1 answer

To determine the correct option regarding the offspring from the cross, we first need to understand the genotype of the parents involved.

Assuming a classic Punnett square setup, let’s consider two scenarios based on common crosses:

  1. TT (homozygous tall) × tt (homozygous short):

    • The resulting offspring would be all Tt (heterozygous tall).
  2. Tt (heterozygous tall) × Tt (heterozygous tall):

    • The resulting genotypes would be TT, Tt, Tt, and tt (1 homozygous tall, 2 heterozygous tall, 1 homozygous short).

Given these scenarios, let’s analyze the options:

a) All offspring will be short - This is false; all will not be short in the first scenario, and only one can be short in the second.

b) All offspring will be tall - In the case of TT × tt, this is not true, as it will also produce some short offspring (tt).

c) All offspring will be homozygous tall - This can only happen under the TT × TT cross, which isn't applicable in these scenarios.

d) All offspring will be heterozygous short - This is not possible because heterozygous individuals (Tt) are tall, not short.

Given the typical scenarios for these genotypes, none of the options provided seem to be true universally across all possible parent combinations, but if you're considering a specific combination, provide it, and I can refine the answer accordingly! Generally, based on the common expectations for a tall (dominant) and short (recessive) plant phenotype, it would be more common to see a situation where the offspring are either all tall or a mix of tall and short, not strictly fitting any of the descriptions provided.