Sex determination


Sex determination


→ Sex of the baby is determined by SRY gene.

→ SRY gene is present on the distal end of short arm of Y- chromosome.

→ If it is present (Y chromosome) then it is male baby; if absent then female.

→ E.g. Turner syndrome- 45 XO- Y is missing, female baby.

→ E.g. Klinefelter’s syndrome- 47 XXY- Y is present, male baby.

→ Genes favor testes development is: SOX-9

→ Genes favor Ovaries development are: RSPO-1, WnT-4

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