Difference between revisions of "Sexual Differentiation - Anatomy & Physiology"
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== Genetic Sex == | == Genetic Sex == | ||
| − | + | * Established at the time of '''fertilisation'''. | |
| − | + | * The foetus receives its genetic endowment in two equal portions from the male gamete ('''Spermatozoon''') and female gamete ('''Oocyte'''). | |
| + | * The X sex chromasome is larger than the Y sex chromasome. | ||
| + | * '''Females''' have XX chromasomes. All oocytes contain one X chromasome, they are the '''homogametic''' sex. | ||
| + | * '''Males''' have XY chromasomes. Spermatozoa form two distinct populations, one containing X chromasomes and one containing Y chromasomes. They are the '''heterogametic''' sex. | ||
== Internal Genetalia == | == Internal Genetalia == | ||
Revision as of 09:14, 3 July 2008
Genetic Sex
- Established at the time of fertilisation.
- The foetus receives its genetic endowment in two equal portions from the male gamete (Spermatozoon) and female gamete (Oocyte).
- The X sex chromasome is larger than the Y sex chromasome.
- Females have XX chromasomes. All oocytes contain one X chromasome, they are the homogametic sex.
- Males have XY chromasomes. Spermatozoa form two distinct populations, one containing X chromasomes and one containing Y chromasomes. They are the heterogametic sex.