Let's analyze the given Punnett square.
The Punnett square shows the genotypes of the offspring resulting from a cross between a male and female organism with alleles "X" and "x".
Here is the interpretation of the Punnett square:
| | | Male | | |
|-------|--------|------|------|------|
| | | X | x |
| Female| X | XX | Xx |
| | x | Xx | xx |
In the Punnett square:
- The top row represents the male alleles: "X" and "x".
- The left column represents the female alleles: "X" and "x".
- The cells show the possible combinations of these alleles in the offspring.
From this, we can determine the following genotypes for the offspring:
1. Homozygous dominant (XX)
2. Heterozygous (Xx)
3. Heterozygous (Xx)
4. Homozygous recessive (xx)
To predict the phenotypes:
- The dominant phenotype occurs in the presence of at least one dominant allele "X". This happens in the homozygous dominant (XX) and heterozygous (Xx) genotypes.
- The recessive phenotype occurs only in the homozygous recessive (xx) genotype.
Based on the Punnett square:
- There are 3 dominant phenotypes (1 Homozygous dominant and 2 Heterozygous).
- There is 1 recessive phenotype (Homozygous recessive).
The fractions of the offspring with each phenotype are:
- Dominant phenotype: 3 out of 4 offspring, which is [tex]\(\frac{3}{4} = 0.75\)[/tex]
- Recessive phenotype: 1 out of 4 offspring, which is [tex]\(\frac{1}{4} = 0.25\)[/tex]
Therefore:
- [tex]\(\boxed{\frac{3}{4}}\)[/tex] of the offspring would have the dominant phenotype.
- [tex]\(\boxed{\frac{1}{4}}\)[/tex] of the offspring would have the recessive phenotype.
