Two people ( both heterozygotes are able to taste a chemical substance called ptc. the ability to taste ptc is caused by a dominant allele (t. the inability to taste ptc is caused by a recessive allele (t. what proportion of their offspring would be expected to be heterozygous?

Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?

What terms describes being out of water after being submerged

Why is the statement not a hypothesis? sunflowers require soil and plenty of sunlight and water to grow and thrive.