1. The most common component/class of chemical compounds that form a gradient for the anterior and posterior organizing centers in Drosophila eggs.
2. In mammals the equivalent of the vitelline envelope of a sea urchin is called the_____?
3. The term that describes the point in development at which zygotic gene expression becomes dominant over maternal components.
4. The term used to describe the cellular structure of a Drosophila embryo when the bicoid gene interacts with other genes is being expressed.
1.three important classes of pattern regulating genes specify the anterior and posterior axis maternal effect genes, segmentation genes, homeotic genes.But the most important among these is Maternal effect genes.
Gene involved are bicoid and hunchback for anterior segment. Bicoid is also known as cordinate gene responsible for polarity.
Nanos and caudal for the posterior part.
2.zona pellucida.
3.After the switch from the maternal to zygotic genes, the drosphila starts synthesizing its own genes at drosophila blastoderm.
4.syncytial blastoderm.
1. The most common component/class of chemical compounds that form a gradient for the anterior and...
1. What is the difference between a parasegment and segment in Drosophila development? a) Segments correspond to the anatomical divisions seen in larvae and adults, whereas parasegments are subdivisions of the embryo that correspond to regions or domains of gene expression. b) Parasegments correspond to the anatomical divisions seen in larvae and adults, whereas segments are subdivisions of the embryo that correspond to regions or domains of gene expression. 2. Which of the following statements about vertebrate Hox genes is...
Developmental Biology Help! Please answer all the questions 1) We discussed the fact that each stripe expression pattern is affected by the enhancer region that is utilized. Knowing that the maternal genes and the gap genes can both contribute to the pair-rule genes, and that in many cases multiple stripes may be contained in one area of GAP, how does the embryo have definition of stripes if all of these transcription factors can be within the same cell A it...
Developmental biology help! 1) In creating a keller explant, we are attempting to observe a the effects that bottle cells are required to achieve b autonomous convergence and extension c all of these answers d non-autonomous movements of gastrulation 2) In papers regarding frogs, quite a few genes were named will an X. What does this represent? a That the gene's products (mRNA or protein) were non-functional b none of these answers c that the gene was knocked out via...