1) Explain why each of the following happens: A. Overexpression of Macho-1 in th
ID: 216088 • Letter: 1
Question
1) Explain why each of the following happens:
A. Overexpression of Macho-1 in the ascidian embryo results in an increase in the number of muscle cells but a decrease in the number of endoderm cells.
B. Explanted Hensen’s node cells from a chick embryo sandwiched between frog ectodermal tissue can induce neural genes in the frog cells.
C. Expression of hairy1 in the chick shows multiple different patterns even at the same stage of development (as defined by somite number).
D. In Arabidopsis, removal of the apical meristem causes lateral buds to begin developing.
Explanation / Answer
A. macho 1 protein is synthesized by macho gene which is responcible for the formation of macho protein. Macho 1 protein is associated with muscle formation and differention of muscle cells. Overexpression of these genes inhibits the epidermal cell differentiation and use these cell ratios for more muscle formation.
B. Inn chick embryo henson node is involved in the formation of neural tube in the central region and transfer of these cells to frog leads to smae phenotype because it is associated with conditional differentiation. Means, cells migrates at the particular location and make contact with neighbour cells and allows more differentiation.
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