- egg-polarity gene
-
A gene whose product distribution in the egg determines the anterior-posterior axis of subsequent development. Best characterized in Drosophila : see bicoid, maternal-effect gene.
Dictionary of molecular biology. 2004.
egg-polarity gene
Look at other dictionaries:
maternal-effect gene — Gene, usually required for early embryonic development, whose product is secreted into the egg by the mother. The phenotype is thus determined by the mother s, rather than the egg s, genotype, cf. zygotic effect gene. See also egg polarity gene … Dictionary of molecular biology
gap gene — Segmentation genes involved in specifying relatively coarse subdivisions of the embryo. They are expressed sequentially in development between egg polarity genes and pair rule genes. In Drosophila, there are at least three such genes, eg. Kruppel … Dictionary of molecular biology
bicoid — An egg polarity gene in Drosophila, concentrated at the anterior pole of the egg, and required for subsequent anterior structures. A maternal effect gene … Dictionary of molecular biology
oskar — An egg polarity gene in Drosophila, concentrated at the posterior pole of the egg, and required for subsequent posterior structures. A maternal effect gene … Dictionary of molecular biology
Regional specification — In the field of developmental biology, regional specification is the process by which different areas are identified in the development of the early embryo. The process by which the cells become specified differs between organisms. Contents 1… … Wikipedia
Hedgehog signaling pathway — In a growing embryo, cells develop differently in the head or tail end of the embryo, the left or right, and other positions. They also form segments which develop into different body parts. The hedgehog signaling pathway gives cells this… … Wikipedia
Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… … Universalium
evolution — evolutional, adj. evolutionally, adv. /ev euh looh sheuhn/ or, esp. Brit., /ee veuh /, n. 1. any process of formation or growth; development: the evolution of a language; the evolution of the airplane. 2. a product of such development; something… … Universalium
Drosophila embryogenesis — Drosophila embryogenesis, the process by which Drosophila (fruit fly) embryos form, is a favorite model system for geneticists and developmental biologists studying embryogenesis. The small size, short generation time, and large brood size make… … Wikipedia
cell — cell1 cell like, adj. /sel/, n. 1. a small room, as in a convent or prison. 2. any of various small compartments or bounded areas forming part of a whole. 3. a small group acting as a unit within a larger organization: a local cell of the… … Universalium
