Two alleles of a given gene exist in a population: ctgt and tgtc. (note: the codes given are only for the transcribed strand of the dna in the two alleles.) three possible single crossover events are possible between these two alleles. as a result of the three different crossover events, how many total new alleles (new sequences of dna) could be produced?
choice a., 3
choice b., 4
choice c., 5
choice d., 6
choice e., 12

Been sitting here trying to take this test and don't know this answer! place the events of a feedback mechanism associated with body temperature in the correct order. ·nerve cells send message from skin to the brain ·body returned to normal temperature around 98.6 degrees f ·temperatures regulation center in the brain sends out signals ·body temperature exceeds 98.6 degrees f ·sweat glands throughout the body activate to cool off skin surface it is a 1 through 5 question in biology!