The genetics of sex

In this topic

• Sex as an inherited character. The karyotype
• Mechanisms of sex determination
• Why the ratio is 1 : 1
• The human X and Y chromosomes

Key terms

• Karyotype
• Autosome
• Sex chromosomes
• Homogametic sex
• Heterogametic sex
• Hemizygous
• The SRY gene
• Barr body
• Haplo-diploid system
• Secondary sex ratio
• Sex-limited character
• Sex-influenced character

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