Looking for reliable answers? Westonci.ca is the ultimate Q&A platform where experts share their knowledge on various topics. Find reliable answers to your questions from a wide community of knowledgeable experts on our user-friendly Q&A platform. Experience the ease of finding precise answers to your questions from a knowledgeable community of experts.
Sagot :
To understand the generational patterns when crossing two true-breeding parents with opposite traits for cleft chin (dominant, represented by [tex]\( C \)[/tex]) and no-cleft chin (recessive, represented by [tex]\(c\)[/tex]), we can follow Mendel's method of genetic inheritance. Let's break it down step-by-step:
1. P Generation (Parental Generation):
- One parent is homozygous dominant ([tex]\( CC \)[/tex]) for cleft chin.
- The other parent is homozygous recessive ([tex]\(cc\)[/tex]) for no-cleft chin.
- When these two parents are crossed, their offspring will be heterozygous ([tex]\(Cc\)[/tex]).
2. F1 Generation (First Filial Generation):
- All offspring (F1) from the P generation are heterozygous ([tex]\(Cc\)[/tex]).
- Since cleft chin ([tex]\(C\)[/tex]) is dominant, all F1 individuals will display the cleft chin phenotype.
3. F2 Generation (Second Filial Generation):
- F1 individuals ([tex]\(Cc\)[/tex]) are crossed with each other.
- By constructing a Punnett square for the [tex]\(Cc \times Cc\)[/tex] cross:
```
C c
+---+---+
C | CC | Cc |
+---+---+
c | Cc | cc |
+---+---+
```
- Genotype ratio: 1 [tex]\(CC\)[/tex]: 2 [tex]\(Cc\)[/tex]: 1 [tex]\(cc\)[/tex]
- Phenotype ratio: 3 with cleft chin (1 [tex]\(CC\)[/tex] + 2 [tex]\(Cc\)[/tex]) : 1 with no-cleft chin (1 [tex]\(cc\)[/tex]).
Based on this analysis, we can answer the given options:
1. The P generation, [tex]$F_1$[/tex] generation, and [tex]$F_2$[/tex] generation will have all cleft chins.
- False. The F2 generation will have a mix of cleft chin and no-cleft chin individuals.
2. The P generation, [tex]$F_1$[/tex] generation, and [tex]$F_2$[/tex] generation will have all no-cleft chins.
- False. The P generation and F1 generation will have cleft chins due to the dominant gene, and the F2 generation will have a mix.
3. The P generation and [tex]$F_1$[/tex] generation will have all cleft chins.
- True. The P generation (with [tex]\(CC\)[/tex] and [tex]\(cc\)[/tex]) and F1 generation (with [tex]\(Cc\)[/tex]) will all exhibit cleft chins.
4. The [tex]$F_1$[/tex] generation will have all cleft chins.
- True. All members of the F1 generation are [tex]\(Cc\)[/tex], therefore all will have cleft chins due to the dominant [tex]\(C\)[/tex] allele.
5. The P generation and [tex]$F_2$[/tex] generation will have all no-cleft chins.
- False. The P generation will have cleft chins, and the F2 generation is mixed.
6. The P generation and [tex]$F_2$[/tex] generation will have cleft chins and no-cleft chins.
- False. Only the F2 generation will have both cleft and no-cleft chins.
7. The P generation, [tex]$F_1$[/tex] generation, and [tex]$F_2$[/tex] generation will have cleft chins and no-cleft chins.
- False. The P generation and F1 generation will only have cleft chins. Only the F2 generation will show both traits.
Therefore, the correct options are:
- The P generation and [tex]\(F_1\)[/tex] generation will have all cleft chins.
- The [tex]\(F_1\)[/tex] generation will have all cleft chins.
So, your selected answer should include:
- "The P generation and [tex]$F_1$[/tex] generation will have all cleft chins."
- "The [tex]$F_1$[/tex] generation will have all cleft chins."
1. P Generation (Parental Generation):
- One parent is homozygous dominant ([tex]\( CC \)[/tex]) for cleft chin.
- The other parent is homozygous recessive ([tex]\(cc\)[/tex]) for no-cleft chin.
- When these two parents are crossed, their offspring will be heterozygous ([tex]\(Cc\)[/tex]).
2. F1 Generation (First Filial Generation):
- All offspring (F1) from the P generation are heterozygous ([tex]\(Cc\)[/tex]).
- Since cleft chin ([tex]\(C\)[/tex]) is dominant, all F1 individuals will display the cleft chin phenotype.
3. F2 Generation (Second Filial Generation):
- F1 individuals ([tex]\(Cc\)[/tex]) are crossed with each other.
- By constructing a Punnett square for the [tex]\(Cc \times Cc\)[/tex] cross:
```
C c
+---+---+
C | CC | Cc |
+---+---+
c | Cc | cc |
+---+---+
```
- Genotype ratio: 1 [tex]\(CC\)[/tex]: 2 [tex]\(Cc\)[/tex]: 1 [tex]\(cc\)[/tex]
- Phenotype ratio: 3 with cleft chin (1 [tex]\(CC\)[/tex] + 2 [tex]\(Cc\)[/tex]) : 1 with no-cleft chin (1 [tex]\(cc\)[/tex]).
Based on this analysis, we can answer the given options:
1. The P generation, [tex]$F_1$[/tex] generation, and [tex]$F_2$[/tex] generation will have all cleft chins.
- False. The F2 generation will have a mix of cleft chin and no-cleft chin individuals.
2. The P generation, [tex]$F_1$[/tex] generation, and [tex]$F_2$[/tex] generation will have all no-cleft chins.
- False. The P generation and F1 generation will have cleft chins due to the dominant gene, and the F2 generation will have a mix.
3. The P generation and [tex]$F_1$[/tex] generation will have all cleft chins.
- True. The P generation (with [tex]\(CC\)[/tex] and [tex]\(cc\)[/tex]) and F1 generation (with [tex]\(Cc\)[/tex]) will all exhibit cleft chins.
4. The [tex]$F_1$[/tex] generation will have all cleft chins.
- True. All members of the F1 generation are [tex]\(Cc\)[/tex], therefore all will have cleft chins due to the dominant [tex]\(C\)[/tex] allele.
5. The P generation and [tex]$F_2$[/tex] generation will have all no-cleft chins.
- False. The P generation will have cleft chins, and the F2 generation is mixed.
6. The P generation and [tex]$F_2$[/tex] generation will have cleft chins and no-cleft chins.
- False. Only the F2 generation will have both cleft and no-cleft chins.
7. The P generation, [tex]$F_1$[/tex] generation, and [tex]$F_2$[/tex] generation will have cleft chins and no-cleft chins.
- False. The P generation and F1 generation will only have cleft chins. Only the F2 generation will show both traits.
Therefore, the correct options are:
- The P generation and [tex]\(F_1\)[/tex] generation will have all cleft chins.
- The [tex]\(F_1\)[/tex] generation will have all cleft chins.
So, your selected answer should include:
- "The P generation and [tex]$F_1$[/tex] generation will have all cleft chins."
- "The [tex]$F_1$[/tex] generation will have all cleft chins."
We hope you found what you were looking for. Feel free to revisit us for more answers and updated information. We hope our answers were useful. Return anytime for more information and answers to any other questions you have. Keep exploring Westonci.ca for more insightful answers to your questions. We're here to help.
