Food allergies include gastrointestinal symptoms and often hives.
Answer the following statement true (T) or false (F)
True
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Jacob and Monod were intellectually primed to draw the conclusions they did concerning regulation of the lac operon. In part, this was due to their fascination with mechanisms of enzyme regulation. They knew that the activity of some enzymes is regulated
when their reaction product binds to the enzyme, changing its shape and, therefore, its activity. This knowledge allowed them to easily make the intellectual leap to propose _____. A) the existence of the CAP binding site B) allosteric regulation of the repressor C) positive regulation of the lac operon D) the existence of the operator E) co-transcribed and co-regulated genes of bacterial operons
Dosage compensation in mammals typically involves the random inactivation of one of the two X chromosomes relatively early in development. Such X chromosome inactivation often leads to phenotypic mosaicism
Assume that black fur in cats is due to the X-linked recessive gene b, whereas its dominant allele B produces yellow fur. A Bb heterozygote is a mosaic called "tortoise shell" or "calico." Using appropriate gene symbols, diagram a mating between a black male and a calico female. Give the phenotypes and genotypes of all the offspring.
Which genes are expressed in Drosophila after pattern formation along the A/P axis has been successfully established?
A. homeotic genes B. gap genes C. segment polarity genes D. bicoid genes E. totipotent genes
During the lab, when removing your sample, it is important to take it from the _______ of the container. This is where the most organisms will be found.
A) Top B) Bottom