Answered

IDNLearn.com is committed to providing high-quality answers to your questions. Our experts provide timely and accurate responses to help you navigate any topic or issue with confidence.

Select all the correct answers.

A particular plant has two alleles that control the length of its stem. T represents the dominant allele that codes for a tall stem, and t represents the recessive allele that codes for a short stem. Based on the Punnett squares, which two statements are true about the genotype of the plant's stem length?

\begin{tabular}{|c|c|c|}
\hline
First Generation & [tex]$t$[/tex] & [tex]$t$[/tex] \\
\hline
[tex]$T$[/tex] & Tt & Tt \\
\hline
[tex]$T$[/tex] & Tt & Tt \\
\hline
\end{tabular}

\begin{tabular}{|c|c|c|}
\hline
Second Generation & [tex]$T$[/tex] & [tex]$t$[/tex] \\
\hline
[tex]$T$[/tex] & TT & Tt \\
\hline
[tex]$t$[/tex] & Tt & tt \\
\hline
\end{tabular}

- Plants with short stems are homozygous for that trait.
- Plants with tall stems are always homozygous for that trait.
- Both parent plants in the second generation are heterozygous.
- Both parent plants in the second generation are homozygous.

Sagot :

GinnyAnsweridn
Let's analyze the four statements based on the given genotypes and Punnett squares:

### Plants with short stems are homozygous for that trait.
- For a plant to have short stems, it must possess two recessive alleles (tt).
- 'tt' is a homozygous genotype because both alleles are the same (both recessive).
- Therefore, this statement is true.

### Plants with tall stems are always homozygous for that trait.
- A tall stem can result from either 'TT' (homozygous dominant) or 'Tt' (heterozygous).
- Since tall stems can be heterozygous (Tt), it is not necessary for tall plants to always be homozygous (TT).
- Therefore, this statement is false.

### Both parent plants in the second generation are heterozygous.
- The second-generation Punnett square indicates genotypes TT, Tt, Tt, and tt.
- For this Punnett square to occur, one parent must be 'Tt' and the other 'Tt', but the combinations shown indicate one parent is 'TT' and the other is 'tt'.
- This means the parents from the second generation are not both heterozygous.
- Therefore, this statement is false.

### Both parent plants in the second generation are homozygous.
- According to the Punnett square for the second generation (TT, Tt, Tt, tt), we deduce that the parents are 'TT' (homozygous dominant) and 'tt' (homozygous recessive).
- Both parents are indeed homozygous, just for different traits.
- Therefore, this statement is true.

### Conclusion
Based on the analysis:
- Plants with short stems are homozygous for that trait.
- Both parent plants in second generation are homozygous.

So, the correct statements are:
- Plants with short stems are homozygous for that trait.
- Both parent plants in second generation are homozygous.
We value your presence here. Keep sharing knowledge and helping others find the answers they need. This community is the perfect place to learn together. IDNLearn.com is your go-to source for accurate answers. Thanks for stopping by, and come back for more helpful information.