Find the best answers to your questions at Westonci.ca, where experts and enthusiasts provide accurate, reliable information. Get immediate and reliable solutions to your questions from a community of experienced professionals on our platform. Get immediate and reliable solutions to your questions from a community of experienced professionals on our platform.
Sagot :
To determine the most likely genotypes of the parents based on the given data, let's analyze the inheritance pattern of fur color in mice.
The data provided is:
- 22 mice with black fur
- 23 mice with white fur
- Total of 45 mice
### Step 1: Understanding the Genotype and Phenotype Relationship
- Assume the fur color trait is controlled by a single gene with two alleles: F (dominant allele for black fur) and f (recessive allele for white fur).
- Black fur can result from either FF (homozygous dominant) or Ff (heterozygous).
- White fur results from ff (homozygous recessive) only.
### Step 2: Analyze the Ratio
The numbers of black and white fur mice are nearly equal, about a 1:1 ratio (22 black to 23 white).
### Step 3: Evaluate Possible Parental Genotype Combinations
#### Option A: FF (black) × ff (white)
- All offspring would be Ff (black). This option would produce 100% black fur offspring and 0% white fur offspring, inconsistent with the data.
#### Option B: FF (black) × Ff (black)
- This combination would yield:
- 50% FF (black)
- 50% Ff (black)
- Resulting in 100% black fur and 0% white fur, inconsistent with the data.
#### Option C: Ff (black) × Ff (black)
- This combination would yield a classic Mendelian 3:1 ratio:
- 25% FF (black)
- 50% Ff (black)
- 25% ff (white)
- However, since Ff and FF both display black fur, the phenotypic ratio observed would be 75% black to 25% white in large samples.
- Important: In smaller samples or specific cases such as 45 offspring, approximate ratios can vary due to statistical fluctuation. An approximate 1:1 ratio here suggests that random distribution has slightly deviated from theoretical expectation but still supports Ff x Ff.
#### Option D: Ff (black) × ff (white)
- This combination would yield:
- 50% Ff (black)
- 50% ff (white)
- This results in a 1:1 ratio of black to white fur, closely matching the observed data.
### Step 4: Conclusion
Given the nearly 1:1 ratio of black to white fur mice, the most likely genotype of the parents is indeed that which typically produces this ratio. This supports the combination:
- Option C: Ff and Ff
Thus, the most likely genotypes of the parents are:
Ff and Ff (Option C).
The data provided is:
- 22 mice with black fur
- 23 mice with white fur
- Total of 45 mice
### Step 1: Understanding the Genotype and Phenotype Relationship
- Assume the fur color trait is controlled by a single gene with two alleles: F (dominant allele for black fur) and f (recessive allele for white fur).
- Black fur can result from either FF (homozygous dominant) or Ff (heterozygous).
- White fur results from ff (homozygous recessive) only.
### Step 2: Analyze the Ratio
The numbers of black and white fur mice are nearly equal, about a 1:1 ratio (22 black to 23 white).
### Step 3: Evaluate Possible Parental Genotype Combinations
#### Option A: FF (black) × ff (white)
- All offspring would be Ff (black). This option would produce 100% black fur offspring and 0% white fur offspring, inconsistent with the data.
#### Option B: FF (black) × Ff (black)
- This combination would yield:
- 50% FF (black)
- 50% Ff (black)
- Resulting in 100% black fur and 0% white fur, inconsistent with the data.
#### Option C: Ff (black) × Ff (black)
- This combination would yield a classic Mendelian 3:1 ratio:
- 25% FF (black)
- 50% Ff (black)
- 25% ff (white)
- However, since Ff and FF both display black fur, the phenotypic ratio observed would be 75% black to 25% white in large samples.
- Important: In smaller samples or specific cases such as 45 offspring, approximate ratios can vary due to statistical fluctuation. An approximate 1:1 ratio here suggests that random distribution has slightly deviated from theoretical expectation but still supports Ff x Ff.
#### Option D: Ff (black) × ff (white)
- This combination would yield:
- 50% Ff (black)
- 50% ff (white)
- This results in a 1:1 ratio of black to white fur, closely matching the observed data.
### Step 4: Conclusion
Given the nearly 1:1 ratio of black to white fur mice, the most likely genotype of the parents is indeed that which typically produces this ratio. This supports the combination:
- Option C: Ff and Ff
Thus, the most likely genotypes of the parents are:
Ff and Ff (Option C).
Thank you for choosing our service. We're dedicated to providing the best answers for all your questions. Visit us again. Thank you for choosing our platform. We're dedicated to providing the best answers for all your questions. Visit us again. Thank you for choosing Westonci.ca as your information source. We look forward to your next visit.
