Describe the Three Layers of Cells That Develop at the Beginning

question 71

Essay

Describe the three layers of cells that develop at the beginning of the embryonic period.

---

Definitions:

Penetrance

In genetics, the proportion of people with a given genetic endowment that actually express the effects of this endowment.

Meiosis

A type of cell division that reduces the chromosome number by half, creating four haploid cells, each genetically distinct from the parent cell that gave rise to them.

Gene Dominance

A phenomenon in genetics where one allele masks the expression of another allele in determining phenotypic traits.

Condition Passed

The state of having moved beyond a particular condition, problem, or stage, often implying improvement or resolution.