Examlex
The most common source of genetic variation in sexually reproducing organisms is
Primary Sex Characteristics
The physical features that are directly involved in human reproduction, including the organs of the reproductive system.
Secondary Sex Characteristics
Physical traits that emerge during puberty but are not directly involved in reproduction, such as breast development in females and facial hair growth in males.
Males
Male individuals of a species, especially human beings, characterized by XY chromosomes.
HIV/AIDS
Human Immunodeficiency Virus (HIV) is a virus that attacks the immune system, while Acquired Immune Deficiency Syndrome (AIDS) is the most advanced stage of HIV infection.
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