when the presumptive eye region from a gastrula is grafted into the trunk region of another neurula, it develops to somitic tissue; whereas transplant from eye region of later stage neurula develops as an eye-like structure in host embryo. Which statement describes the results best?

 

TLS Online TPP Program

#Question id: 4803

#SCPH28 | Zoology

Linked genes:

TLS Online TPP Program

#Question id: 3448

#SCPH06 I Botany

Which scientist devised a rule that predicts when natural selection should favor altruism?

TLS Online TPP Program

#Question id: 20987

#SCPH28 | Zoology

Toluene degradation could be optimized and linked to the reduction of 

1. Nitrate 

2. Nitrous oxide

3. Nitrite

Which of the below combinations are correct?

TLS Online TPP Program

#Question id: 18377

#SCPH01 Biochemistry

Why xenobiotic compounds are considered ad recalciterants?

TLS Online TPP Program

#Question id: 15652

#SCPH01 Biochemistry

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium. You have isolated a mutation that causes constitutive melibiase activity, which you designate MelA–. P1 phage mapping experiments using a Tn5 insertion linked to Mel1 show that MelA– is not linked to Mel1. Moreover you find that when an amber suppressor is introduced into a MelA– mutant, normal melibiase regulation is restored. Classify the MelA– mutation in terms of its basic genetic properties,