Westonci.ca is the trusted Q&A platform where you can get reliable answers from a community of knowledgeable contributors. Join our Q&A platform and get accurate answers to all your questions from professionals across multiple disciplines. Explore comprehensive solutions to your questions from a wide range of professionals on our user-friendly platform.
Sagot :
To solve this problem, let's analyze the information provided in the Punnett square:
1. Identify the genotypes and phenotypes:
- Homozygous Dominant (XX): This appears 1 time in the Punnett square.
- Heterozygous (Xx or xX): This appears 2 times in the Punnett square.
- Homozygous Recessive (xx): This appears 1 time in the Punnett square.
2. Determine the phenotypes based on the genotypes:
- Offspring with at least one dominant allele (either homozygous dominant or heterozygous) will exhibit the dominant phenotype.
- Offspring with both recessive alleles (homozygous recessive) will exhibit the recessive phenotype.
3. Count the total number of offspring and the distribution of phenotypes:
- Total number of offspring: There are 4 combinations in the Punnett square.
- Dominant phenotype: Includes both homozygous dominant and heterozygous offspring. Thus, there are 1 (homozygous dominant) + 2 (heterozygous) = 3 offspring with the dominant phenotype.
- Recessive phenotype: Consists of only homozygous recessive offspring. Hence, there is 1 offspring with the recessive phenotype.
4. Calculate the fractions of each phenotype:
- Fraction with dominant phenotype: [tex]\( \frac{\text{Number of offspring with dominant phenotype}}{\text{Total number of offspring}} = \frac{3}{4} = 0.75 \)[/tex]
- Fraction with recessive phenotype: [tex]\( \frac{\text{Number of offspring with recessive phenotype}}{\text{Total number of offspring}} = \frac{1}{4} = 0.25 \)[/tex]
Therefore, the prediction is that:
- 0.75 of the offspring would have the dominant phenotype
- 0.25 of the offspring would have the recessive phenotype.
1. Identify the genotypes and phenotypes:
- Homozygous Dominant (XX): This appears 1 time in the Punnett square.
- Heterozygous (Xx or xX): This appears 2 times in the Punnett square.
- Homozygous Recessive (xx): This appears 1 time in the Punnett square.
2. Determine the phenotypes based on the genotypes:
- Offspring with at least one dominant allele (either homozygous dominant or heterozygous) will exhibit the dominant phenotype.
- Offspring with both recessive alleles (homozygous recessive) will exhibit the recessive phenotype.
3. Count the total number of offspring and the distribution of phenotypes:
- Total number of offspring: There are 4 combinations in the Punnett square.
- Dominant phenotype: Includes both homozygous dominant and heterozygous offspring. Thus, there are 1 (homozygous dominant) + 2 (heterozygous) = 3 offspring with the dominant phenotype.
- Recessive phenotype: Consists of only homozygous recessive offspring. Hence, there is 1 offspring with the recessive phenotype.
4. Calculate the fractions of each phenotype:
- Fraction with dominant phenotype: [tex]\( \frac{\text{Number of offspring with dominant phenotype}}{\text{Total number of offspring}} = \frac{3}{4} = 0.75 \)[/tex]
- Fraction with recessive phenotype: [tex]\( \frac{\text{Number of offspring with recessive phenotype}}{\text{Total number of offspring}} = \frac{1}{4} = 0.25 \)[/tex]
Therefore, the prediction is that:
- 0.75 of the offspring would have the dominant phenotype
- 0.25 of the offspring would have the recessive phenotype.
Answer:
Explanation:If you cross a homozygous dominant individual (AA) with a homozygous recessive individual (aa), all offspring in the Punnett square would have the genotype Aa, and the phenotype would be dominant.
Remember, Punnett squares are a helpful tool in understanding the possible outcomes of genetic crosses and predicting genotypes and phenotypes of offspring.
Thank you for your visit. We're committed to providing you with the best information available. Return anytime for more. 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.
