which allele combination represents a female who is a carrier for an x - linked recessive disorder?\n○ ( x ^…

which allele combination represents a female who is a carrier for an x - linked recessive disorder?\n○ ( x ^ { r } x ^ { r } )\n○ ( x ^ { r } x ^ { r } )\n○ ( x ^ { r } y )\n○ ( x ^ { r } y )

which allele combination represents a female who is a carrier for an x - linked recessive disorder?\n○ ( x ^ { r } x ^ { r } )\n○ ( x ^ { r } x ^ { r } )\n○ ( x ^ { r } y )\n○ ( x ^ { r } y )

Answer

Brief Explanations:

  • A carrier has one normal allele and one recessive allele.
  • Females have two X chromosomes ((X^{R}X^{r}) indicates one normal ((X^{R})) and one recessive ((X^{r})) allele).
  • (X^{r}X^{r}) is affected (both recessive), (X^{R}Y) is male (has Y chromosome), (X^{r}Y) is male and affected.

Answer:

(X^{R}X^{r}) (first option)