A human fetus that has the genotype XO will be designated female because:

A. female sex is determined by the presence
of a gene on the X chromosome.
B. female sex is determined by the absence
of TDF, a protein produced by a gene on the
fetus's Y chromosome.
C. female sex is determined by only one X
chromosome.
D. female sex is determined by the presence
of TDF, a protein produced by a gene on the
fetus's X chromosome.


B

Biology & Microbiology

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