The commercial Bt–cotton available today contain genes from the isolate B-thuringiensis, ssp. that produces Cry I A(a), Cry I A(b), Cry I A(c), Cry IIA.

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#Id: 987

#Unit 5. Developmental Biology

In Drosophila, mid-blastula transition slowdown of nuclear division, cellularization, and concomitant increase in new RNA transcription

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#Id: 988

#Unit 5. Developmental Biology

The transition from specification to determination in Drosophila is mediated by Segmentation genes.

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#Id: 989

#Unit 5. Developmental Biology

First zygotic genes is Gap genes. Mutations in them cause gaps in the segmentation pattern.

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#Id: 990

#Unit 5. Developmental Biology

Gurken protein is a member of the EGF (epidermal growth factor) family, and Torpedo encodes a homologue of the vertebrate EGF receptor.

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#Id: 991

#Unit 5. Developmental Biology

An anterior-to-posterior gradient of Bicoid protein.

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#Id: 992

#Unit 5. Developmental Biology

Bicoid act as the anterior morphogen.