A scientist clones a regulatory gene that is involved in controlling the expression of other genes, and discovers that the regulatory gene encodes a histone deacetylase enzyme. It is likely that this enzyme regulates gene expression by: A.Causing tighter packing of the chromatin at the target gene, thereby inhibiting transcription […]

QUESTION 1: An Hfr strain is used to map three genes in an interrupted matingexperiment. The cross is Hfr/a+ b+ c+ rif X F-/a- b- c- rifr. (Nomap order is implied in the listing of the alleles; rifr isresistance to the antibiotic rifampicin.) The a+ gene is requiredfor the biosynthesis […]

1 Chambers A and B are separated by a membrane. Chamber A contains 7.22 M KNO3 and chamber B contains 3.89 M KNO3. If K+ is in equilibrium across the membrane, what is the electrical (potential) difference (Resting membrane potential)? Which side is electrically positive? I am really confused, I […]

Consider Two hypothetical autosomal genes, a and b, where aheterozygote is testcrossed to a double- homozygous mutant. Predictthe phenotypic ratios under the following conditions: a) a and b are located on seperate autsomes b) a and b are linked on the same autosome, but are so farapart that a crossover […]