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#Question id: 19885
#Unit 13. Methods in Biology
The plasmid used by Cohen and Boyer fr their transformation experiment was
TLS Online TPP Program
#Question id: 15191
#Unit 8. Inheritance Biology
Genes that control coat color in mammals represent some of the best early examples of genes with multiple alleles exhibiting different phenotypes. A classic example is the C gene in hamsters. Three of the known alleles of this gene are C, ck and ca. Each supplies a different amount of black pigment to the coat hair. The phenotypes of three different homozygous strains are as follows.
Based on the concepts of dominance, determine whether ck and ca were dominant or recessive alleles by crossing the true-breeding sepia hamsters to true-breeding black hamsters. From the resulting F1 progeny phenotype, what would be the ratio of F2 phenotype
TLS Online TPP Program
#Question id: 11547
#Unit 7. System Physiology – Animal
A cluster of tumor cells that produces and secretes growth factors to induce surrounding cells to grow and divide is showing which type of cell-to-cell signaling?
TLS Online TPP Program
#Question id: 20276
#Unit 7. System Physiology – Animal
Central diabetes insipidus is caused by failure of the posterior pituitary to secrete ADH and the following statements pertain to that disorder:
A. excretion of large volumes of dilute urine
B. the urine cannot be concentrated
C. produces large volumes of dilute urine
D. increased serum osmolarity
E. circulating levels of ADH are high
Which of the following is the correct combination of the statements given above?
TLS Online TPP Program
#Question id: 10380
#Unit 6. System Physiology – Plant
Two separate processes, the first involves a signaling pathway that facilitates the infection process itself and the second involves the activation of a set of genes that regulate the formation of root nodules. Which of the following receptor is thought to participate in both processes?