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Reaching the Age of Adolescence — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceReaching the Age of Adolescence4 Marks
Question
Explain primary and secondary sexual characteristics in humans with examples.
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Answer

The traits that separate male from females are called primary and secondary sexual characteristics. Primary sexual characteristics are those which are present by birth and are determined by chromosomes whereas secondary sexual characteristics are those which distinguishes sexually mature male from female.
Primary sexual characteristics
Secondary sexual characteristics
Penis and scrotum growth.
Facial hairs.
Ovary, uterus, vagina, clitoris and labia growth.
Enlarged breats and hips.
 
Hair and sweat gland changes.

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