View Full Document. ï¬ 1  Primers determine the specificity of the PCR reaction. ï¬ The distance between the primer binding sites will determine the size of the PCR product. 2  T m ï¬ For short (14â20 bp) oligomers: ï¬ T m = 4Â° (GC) + 2Â° (AT)
Estrus, or heat, is the period in which the doe will stand and allow the buck to breed her. This phase of the reproductive cycle may last between 12 to 36 hours. The period from one heat cycle to the next is referred to as the estrous cycle. In goats, the estrous cycle occurs every 18 to 24 days, or 21 days on average.
The elk rut takes place between the middle of August and the middle of October, depending on the climate in which they live. The elk rut occurs around the same time of year throughout the United States. For example the peak rut in Idaho occurs between September 20 and 25, while the peak rut in New Mexico occurs around September 14. The rut tends to last somewhere between 20 and 45 days. This varies on latitude, for in southern areas spring arrives earlier and fall arrives later giving elk a longer calving season, therefore the rut lasts longer.