The developmental pattern of C. elegans is said to be mosaic...

Name: Problem 11, Chapter 17: Biology
Uploaded: 2021-08-12T04:55:18-08:00
Duration: 1 min 32 s
Channel: Tanner Fonjweng
Description: The developmental pattern of C. elegans is said to be mosaic because (a) development is controlled by gradients of morphogens (b) part of the embryo fails to develop if a founder cell isdestroyed (c) some individuals are self-fertilizing hermaphrodites (d) all development is controlled by maternal effect gene (e) apoptosis never occurs

The developmental pattern of C. elegans is said to be mosaic because (a) development is controlled by gradients of morphogens (b) part of the embryo fails to develop if a founder cell isdestroyed (c) some individuals are self-fertilizing hermaphrodites (d) all development is controlled by maternal effect gene (e) apoptosis never occurs

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Key Concepts

Mosaic Development

Mosaic development is a mode of embryogenesis in which the fate of each embryonic cell is predetermined by intrinsic factors. In such systems, specific cells, often referred to as founder cells, are committed to form particular tissues or structures, so that if one of these cells is removed or damaged, the missing part of the organism cannot be compensated for by other cells.

Founder Cells

Founder cells are early embryonic cells that set aside specific developmental fates and guide the formation of discrete parts of the organism. In mosaic organisms, these cells carry specific determinants, and damage to or elimination of a founder cell typically results in the failure to develop the structure it was destined to form.

Maternal Effect Genes

Maternal effect genes are genes whose products, deposited in the egg by the mother, are critical for the early stages of development. They establish the initial conditions and set up the developmental program in the embryo by localizing determinants that direct cell fate, which is central to mosaic development where cell lineages are predetermined.

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