Chapter 6 Chapter Outline

SEX DETERMINATION

Chromosomal Sex Determination

The Mammalian Pattern of Sex Determination

• Gonadal sex determination in mammals
• Secondary sex determination in mammals: Hormonal regulation of the sexual phenotype

Chromosomal Sex Determination in Drosophila

• Sex determination by dosage of X
• The Sex-lethal gene
• Doublesex: The switch gene for sex determination

Environmental Sex Determination

Gametogenesis in Animals

• PGCs in mammals: From genital ridge to gonads
• Meiosis: The intertwining of life cycles
• Spermatogenesis in mammals
• Oogenesis in mammals

SEX DETERMINATION AND GAMETOGENESIS IN ANGIOSPERM PLANTS

Sex Determination

Gametogenesis

• Pollen
• The ovule