Meiosis, Germ Cells, and Fertilization
Meiosis, Germ Cells, and Fertilization
Meiosis, Germ Cells, and Fertilization
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Extra gene copies in the cell<br />
• diploid chromosome set for RNA synthesis with 100 to<br />
500 copies of the ribosomal RNA genes<br />
• increased rate of protein synthesis<br />
From neighboring accessory cells<br />
• Yolk imported into the oocyte<br />
• In some invertebrates a common oogonium gives rise to<br />
one oocyte <strong>and</strong> 15 nurse cells<br />
• follicle cells surround each developing oocyte<br />
• gap-junction proteins (connexins) involved in connecting<br />
follicle cells to each other are different from those<br />
connecting follicle cells to the oocyte.
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