Reproduction Flashcards
Sexual Reproduction
Essential for the survival of a species.
Meiosis
Going from 2N to N.
Oogenesis
Formation of 1 egg + 3 polar bodies.
Spermatogenesis
Formation of 4 sperm.
Oogonium
1st step in oogenesis. 2N before replication.
Primary Oocyte
2nd step in oogenesis. 4N after replication.
Secondary Oocyte
After the 1st meiotic division. 2N.
Ovum
Product of oogenesis, 1N.
Polar Body
Small N cell, cannot be fertilized.
Spermatogonium
Undifferentiated male germ cell.
Primary Spermatocyte
1st step in meiosis. 2N cell before replication.
Secondary Spermatocyte
2nd step in meiosis, 2N after replication.
Spermatide
Result of spermatogenesis.
Sperm
1N
External Fertilization
Sponges releasing sperm and egg into the environment.
Internal Fertilization
fertilization inside a body.
Protandry
when sex changes
Hermaphrodite
both sexes in one individual
Zona Pellucida
egg coat
Follicle Cells
functional unit of the ovary.
Acrosome
Head of the sperm which allows the sperm to penetrate the egg.
Head of Sperm
Contains DNA.
SRY Gene
male Y chromosome
Pre-Sertoli Cell
becomes a mature sertoli cell