#Question id: 7281
#Unit 5. Developmental Biology
Evolutionary conservation of homeotic gene organization and transcriptional
expression in fruit flies and mice is seen in the similarity between the Hom-C
cluster on Drosophila chromosome 3 and the four Hox gene clusters in the mouse
genome.
According to this figure, Which of the following statement is correct?
#Question id: 7282
#Unit 5. Developmental Biology
In humans, neural tube closure defects occur in about 1 in every 1000 live births. Failure to close the neural tube can result from both genetic and environmental causes. A recent report has demonstrated that zinc deficiency disrupts neural tube closure by:
#Question id: 7283
#Unit 5. Developmental Biology
The Drosophila orthodenticle gene and the vertebrate Otx genes are homologous and provide a good example of the conservation of gene function during evolution. Which of the following statement is correct regarding to the expression of gene expression.
#Question id: 7284
#Unit 5. Developmental Biology
Choose
the correct match.
| Genes | Axis polarity |
| a. Maternal deficiency of gurken | i. Posteriorization of follicle cells |
| b. Maternal deficiency of torpedo | ii. Ventralization of embryo |
| c. Maternal deficiency of toll | iii. Dorsalization of embryo |
| iv. No anterior posterior axis |
#Question id: 7285
#Unit 5. Developmental Biology
During xenopus gastrulation, C3a functions as a short-range chemoattractant to guide the radial intercalation movements of cells. If Knockdown of C3a with antisense morpholinos results:
#Question id: 7286
#Unit 5. Developmental Biology
Which of the floral whorls is affected in apetala 3/pistillata (ap3/pi) mutants?