Sex chromosome analysis

• Male 46,XY Female 46,XX

22 pairs autosomes + 2 gonosomes (karyotype)

Sex genetically determined by sex chromosomes

SRY gene important for testicles development

• Meiosis-gametes - haploid number of chrom.

Ovum 22 autosomes + X

Sperm 22 autosomes + X (1/2) + Y (1/2)

_ 46,XX _ 46,XY

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