Examlex
The Baltimore classification scheme is a useful way to categorize viruses based on their host infectivity.
Spermarche
The beginning of development of sperm in boys’ testicles at puberty, marking the onset of adolescent fertility.
Testes
The male reproductive glands that produce sperm and the hormone testosterone.
XY
A chromosomal designation for male sex in many organisms, including humans, where males typically have one X and one Y chromosome.
SRY Gene
A sex-determining gene on the Y chromosome that triggers the development of male anatomical features.
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