Question

match the genotype with the correct phenotype.\ set-1-heading=\genotype\ set-2-heading=\phenotype
$x^{r}y$
$x^{r}x^{r}$
$x^{r}x^{r}$
$x^{r}y$
choose match
choose match
male fly, red eye
male fly, white eye
female fly, red eye
female fly, white eye

Explanation:

• For \(X^{R}Y\): Males have one \(X\) and one \(Y\) chromosome. Since \(X^{R}\) (dominant allele for red - eye) is present on the \(X\) chromosome, the phenotype is male fly with red eye.
• For \(X^{R}X^{r}\): Females have two \(X\) chromosomes. Here, \(X^{R}\) (dominant) and \(X^{r}\) (recessive) are present. As the dominant allele \(X^{R}\) determines the phenotype, the phenotype is female fly with red eye.
• For \(X^{r}X^{r}\): Females with two recessive \(X^{r}\) alleles (for white - eye) will have the white - eye phenotype.
• For \(X^{r}Y\): Males with \(X^{r}\) (recessive for white - eye) on the \(X\) chromosome will have the white - eye phenotype.

Answer:

• \(X^{R}Y\): Male fly, red eye
• \(X^{R}X^{r}\): Female fly, red eye
• \(X^{r}X^{r}\): Female fly, white eye
• \(X^{r}Y\): Male fly, white eye