Question

question 4
a female who is a carrier for the autosomal recessive disorder t has the genotype
tt.
x^tx.
tt.
tt.

Explanation:

In autosomal - recessive inheritance, a carrier has one normal allele and one mutant allele. The normal allele is represented by a capital letter (T) and the mutant allele by a small letter (t). A carrier does not show the disorder phenotype as the normal allele masks the effect of the mutant allele. So, a carrier for an autosomal - recessive disorder has the genotype Tt. The genotype tt represents an affected individual, TT represents a non - carrier with two normal alleles, and \(X^{t}X\) is related to X - linked inheritance (not autosomal in this case).

Answer:

D. Tt