Answered

Find the best answers to your questions at Westonci.ca, where experts and enthusiasts provide accurate, reliable information. Our platform connects you with professionals ready to provide precise answers to all your questions in various areas of expertise. Join our platform to connect with experts ready to provide precise answers to your questions in different areas.

Select all the correct answers.

A particular plant has two alleles that control the length of its stem. [tex]\( T \)[/tex] represents the dominant allele that codes for a tall stem, and [tex]\( t \)[/tex] 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?

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

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

- 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 :

GinnyAnswer
Let's analyze each statement carefully to determine their validity based on the information provided about the genotypes of the plants.

### Statement 1: Plants with short stems are homozygous for that trait.
In genetics, a recessive trait (in this case, short stems represented by [tex]\( t \)[/tex]) is expressed only when an organism has two copies of the recessive allele, i.e., [tex]\( tt \)[/tex].
- Conclusion: This statement is true because only homozygous [tex]\( tt \)[/tex] will show short stems.

### Statement 2: Plants with tall stems are always homozygous for that trait.
Tall stems can be represented by either the genotype [tex]\( TT \)[/tex] (homozygous dominant) or [tex]\( Tt \)[/tex] (heterozygous), since the allele [tex]\( T \)[/tex] is dominant over [tex]\( t \)[/tex].
- Conclusion: This statement is false because tall stems can also be heterozygous [tex]\( Tt \)[/tex].

### Statement 3: Both parent plants in second generation are heterozygous.
Here, we need to examine the Punnett square for the second generation:
[tex]\[ \begin{tabular}{|c|c|c|} \hline Second Generation & $T$ & $t$ \\ \hline $T$ & $TT$ & $Tt$ \\ \hline $t$ & $Tt$ & $tt$ \\ \hline \end{tabular} \][/tex]
From this Punnett square, the genotypes of the parent plants are [tex]\( Tt \)[/tex] and [tex]\(Tt\)[/tex].
- Conclusion: This statement is true because both parents are indeed heterozygous (Tt).

### Statement 4: Both parent plants in second generation are homozygous.
As addressed in the above analysis, the parents in the second generation are [tex]\( Tt \)[/tex] and [tex]\( Tt \)[/tex]. Given that they are heterozygous, they are not homozygous.
- Conclusion: This statement is false because neither of the parent plants are homozygous (neither [tex]\( TT \)[/tex] nor [tex]\( tt \)[/tex]).

### Summary
Based on the detailed step-by-step analysis:
- Correct Statements:
- Plants with short stems are homozygous for that trait.
- Both parent plants in the second generation are heterozygous.

Thus, the correct answers are:

Plants with short stems are homozygous for that trait.

Both parent plants in second generation are heterozygous.
We hope our answers were useful. Return anytime for more information and answers to any other questions you have. We hope you found this helpful. Feel free to come back anytime for more accurate answers and updated information. Find reliable answers at Westonci.ca. Visit us again for the latest updates and expert advice.