Looking for trustworthy answers? Westonci.ca is the ultimate Q&A platform where experts share their knowledge on various topics. Discover a wealth of knowledge from experts across different disciplines on our comprehensive Q&A platform. Discover detailed answers to your questions from a wide network of experts on our comprehensive Q&A platform.
Sagot :
To solve this problem, we need to use a Punnett square to represent the cross between two plants with genotypes [tex]\( B b \)[/tex] and [tex]\( B b \)[/tex]. The Punnett square is a grid that shows all possible combinations of alleles from the parent plants.
1. Determine the possible gametes:
- Each parent plant can produce two kinds of gametes. Since both plants are [tex]\( B b \)[/tex], the possible gametes are [tex]\( B \)[/tex] and [tex]\( b \)[/tex].
2. Construct the Punnett square:
- We will create a 2x2 grid where each cell represents a possible combination of alleles.
3. Fill in the Punnett square:
- Write the alleles from one parent across the top and the other parent down the side. Typically, if we arrange it, it will look something like this:
```
B b
+-----+-----+
B | BB | Bb |
+-----+-----+
b | Bb | bb |
+-----+-----+
```
- Each cell inside the grid represents the combination of alleles from each parent.
4. Interpret the results:
- The cells contain the following combinations:
- Top left: [tex]\( BB \)[/tex]
- Top right: [tex]\( Bb \)[/tex]
- Bottom left: [tex]\( Bb \)[/tex]
- Bottom right: [tex]\( bb \)[/tex]
From the above Punnett square, we observe that the plants will have the following genotypes:
- 1 [tex]\( BB \)[/tex] (Broad leaves)
- 2 [tex]\( Bb \)[/tex] (Broad leaves)
- 1 [tex]\( bb \)[/tex] (Narrow leaves)
Now, let’s match this outcome with the provided options:
- Option A:
```
\begin{tabular}{|l|l|l|}
\hline & [tex]$B$[/tex] & [tex]$b$[/tex] \\
\hline [tex]$B B$[/tex] & [tex]$B b$[/tex] \\
\hline [tex]$B$[/tex] & [tex]$B b$[/tex] & [tex]$b b$[/tex] \\
\hline
\end{tabular}
```
This representation is incorrect because it does not match the standard layout of input/output gametes.
- Option B:
```
\begin{tabular}{l|l|l|}
\hline & \multicolumn{1}{c|}{[tex]$B$[/tex]} & [tex]$b$[/tex] \\
\hline & [tex]$B b$[/tex] & [tex]$B b$[/tex] \\
\hline [tex]$b$[/tex] & [tex]$B b$[/tex] & [tex]$B b$[/tex] \\
\hline
\end{tabular}
```
This representation is also incorrect because it shows multiple identical entries that do not represent the correct combinations.
- Option C:
```
\begin{tabular}{|l|l|l|}
\multicolumn{1}{l}{} & \multicolumn{1}{c}{} & [tex]$b$[/tex] \\
\hline & [tex]$B b$[/tex] & [tex]$B b$[/tex] \\
\hline & [tex]$B b$[/tex] & [tex]$B b$[/tex] \\
\hline [tex]$b b$[/tex] & [tex]$b b$[/tex] \\
\hline
\end{tabular}
```
This is incorrect because it does not list all unique combinations correctly, and [tex]\( BB \)[/tex] is missing entirely.
- Option D:
```
\begin{tabular}{l|l|l|}
\hline & \multicolumn{1}{|c|}{[tex]$b$[/tex]} \\
\hline [tex]$B$[/tex] & [tex]$B b$[/tex] & [tex]$B b$[/tex] \\
\hline [tex]$b$[/tex] & [tex]$B b$[/tex] & [tex]$b b$[/tex] \\
\hline
\end{tabular}
```
This representation is correctly showing:
- [tex]\( BB \)[/tex] in the top left
- [tex]\( Bb \)[/tex] in top right and bottom left
- [tex]\( bb \)[/tex] in bottom right
Therefore, the correct Punnett square that represents the cross [tex]\( B b \times B b \)[/tex] is option D.
1. Determine the possible gametes:
- Each parent plant can produce two kinds of gametes. Since both plants are [tex]\( B b \)[/tex], the possible gametes are [tex]\( B \)[/tex] and [tex]\( b \)[/tex].
2. Construct the Punnett square:
- We will create a 2x2 grid where each cell represents a possible combination of alleles.
3. Fill in the Punnett square:
- Write the alleles from one parent across the top and the other parent down the side. Typically, if we arrange it, it will look something like this:
```
B b
+-----+-----+
B | BB | Bb |
+-----+-----+
b | Bb | bb |
+-----+-----+
```
- Each cell inside the grid represents the combination of alleles from each parent.
4. Interpret the results:
- The cells contain the following combinations:
- Top left: [tex]\( BB \)[/tex]
- Top right: [tex]\( Bb \)[/tex]
- Bottom left: [tex]\( Bb \)[/tex]
- Bottom right: [tex]\( bb \)[/tex]
From the above Punnett square, we observe that the plants will have the following genotypes:
- 1 [tex]\( BB \)[/tex] (Broad leaves)
- 2 [tex]\( Bb \)[/tex] (Broad leaves)
- 1 [tex]\( bb \)[/tex] (Narrow leaves)
Now, let’s match this outcome with the provided options:
- Option A:
```
\begin{tabular}{|l|l|l|}
\hline & [tex]$B$[/tex] & [tex]$b$[/tex] \\
\hline [tex]$B B$[/tex] & [tex]$B b$[/tex] \\
\hline [tex]$B$[/tex] & [tex]$B b$[/tex] & [tex]$b b$[/tex] \\
\hline
\end{tabular}
```
This representation is incorrect because it does not match the standard layout of input/output gametes.
- Option B:
```
\begin{tabular}{l|l|l|}
\hline & \multicolumn{1}{c|}{[tex]$B$[/tex]} & [tex]$b$[/tex] \\
\hline & [tex]$B b$[/tex] & [tex]$B b$[/tex] \\
\hline [tex]$b$[/tex] & [tex]$B b$[/tex] & [tex]$B b$[/tex] \\
\hline
\end{tabular}
```
This representation is also incorrect because it shows multiple identical entries that do not represent the correct combinations.
- Option C:
```
\begin{tabular}{|l|l|l|}
\multicolumn{1}{l}{} & \multicolumn{1}{c}{} & [tex]$b$[/tex] \\
\hline & [tex]$B b$[/tex] & [tex]$B b$[/tex] \\
\hline & [tex]$B b$[/tex] & [tex]$B b$[/tex] \\
\hline [tex]$b b$[/tex] & [tex]$b b$[/tex] \\
\hline
\end{tabular}
```
This is incorrect because it does not list all unique combinations correctly, and [tex]\( BB \)[/tex] is missing entirely.
- Option D:
```
\begin{tabular}{l|l|l|}
\hline & \multicolumn{1}{|c|}{[tex]$b$[/tex]} \\
\hline [tex]$B$[/tex] & [tex]$B b$[/tex] & [tex]$B b$[/tex] \\
\hline [tex]$b$[/tex] & [tex]$B b$[/tex] & [tex]$b b$[/tex] \\
\hline
\end{tabular}
```
This representation is correctly showing:
- [tex]\( BB \)[/tex] in the top left
- [tex]\( Bb \)[/tex] in top right and bottom left
- [tex]\( bb \)[/tex] in bottom right
Therefore, the correct Punnett square that represents the cross [tex]\( B b \times B b \)[/tex] is option D.
Thank you for trusting us with your questions. We're here to help you find accurate answers quickly and efficiently. We hope our answers were useful. Return anytime for more information and answers to any other questions you have. Westonci.ca is your go-to source for reliable answers. Return soon for more expert insights.
