The bud stage of tooth development describes which of the following events?

A. Dentin secretion begins.
B. Odontoblasts differentiate from jaw mesenchyme.
C. Oral ectoderm invaginates into the mesenchyme of the jaw.
D. Permanent teeth begin to extrude the deciduous teeth.
E. The enamel knot disappears.


Answer: C. Oral ectoderm invaginates into the mesenchyme of the jaw.

Biology & Microbiology

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Assume that a black guinea pig crossed with an albino guinea pig produced five black offspring. When the albino was crossed with a second black guinea pig, four black and three albino offspring were produced

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