the Punnett square shown below, which of the following is true about the offspring resulting from the cross? T 1 Item 16 Item 17 Item 18 Item 19 Item 20 Item 21 Item 22 T Tr T = tall t short T IT Tr < (1 point) About half are expected to be short. All are expected to be short. About half are expected to be tall. All are expected to be tall.

Answer 1

To accurately determine the offspring expected from the cross described in the Punnett square, we need to clarify the genotype of the parent plants involved.

Assuming T represents the dominant allele for tall plants and t represents the recessive allele for short plants, let's consider a typical monohybrid cross. If we assume the cross involves two heterozygous tall plants (Tt x Tt), the Punnett square would look like this:

       T      t
     ______________
T |   TT    |  Tt    |
     ______________
t |   Tt    |  tt    |

From this example, the resulting offspring would be:

• 1 TT (homozygous tall)
• 2 Tt (heterozygous tall)
• 1 tt (homozygous short)

This results in:

• 3 tall (TT and Tt) and
• 1 short (tt).

So, the expected ratio would be 3 tall : 1 short, meaning about 75% of the offspring are expected to be tall, and approximately 25% are expected to be short.

Now, if the cross involved one homozygous tall (TT) and one homozygous short (tt), the Punnett square would look like this:

       T      T
     ______________
t |   Tt    |  Tt    |
     ______________
t |   Tt    |  Tt    |

In this case, all offspring (4 Tt) would be tall.

Based on the options given:

1. About half are expected to be short.
2. All are expected to be short.
3. About half are expected to be tall.
4. All are expected to be tall.

If we have heterozygous tall parents, then about half would not be correct since only 25% are expected to be short. If we have one homozygous tall and one homozygous short parent, the offspring are all tall.

Conclusively:

• If the cross is Tt x Tt: "About half are expected to be tall." would not be true since it's 75% tall.
• If the cross is TT x tt: "All are expected to be tall." would be true.

Without more context about the genotypes of the parents, the safest assumption can't be definitively made. Please confirm the genotypes for accurate determination.