Answered

Find expert advice and community support for all your questions on IDNLearn.com. Find the answers you need quickly and accurately with help from our knowledgeable and dedicated community members.

You make a Punnett square for a cross and find the results shown below.

\begin{tabular}{|c|c|c|c|}
\hline & \multicolumn{2}{|c|}{Male} \\
\hline & & [tex]$X$[/tex] & [tex]$x$[/tex] \\
\hline & [tex]$X$[/tex] & \begin{tabular}{l}
Homozygous \\
dominant
\end{tabular} & Heterozygous \\
\hline & [tex]$x$[/tex] & Heterozygous & \begin{tabular}{l}
Homozygous \\
recessive
\end{tabular} \\
\hline
\end{tabular}

Your prediction is that [tex]$\square$[/tex] of the offspring would have the dominant phenotype, and [tex]$\square$[/tex] of the offspring would have the recessive phenotype.

Sagot :

GinnyAnsweridn
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.
We appreciate your presence here. Keep sharing knowledge and helping others find the answers they need. This community is the perfect place to learn together. Your questions are important to us at IDNLearn.com. Thanks for stopping by, and come back for more reliable solutions.