ANSC 333 Exam 2 Questions With Complete Solutions

ANSC 333 Exam 2 Questions With Complete Solutions Factors that influence the age of puberty - Correct Answer genetics, acute nutrition, long term nutrition, social environment, photoperiod/season Genetics - Correct Answer maternal breeds mature faster (dairy, maternal, terminal, Bos Indicus) Acute Nutrition - Correct Answer ruminants have a more steady income of nutrients; when rats were deprived of glucose, LH levels dropped- most applicable to pigs/monogastrics Long Term Nutrition - Correct Answer when fed above average, puberty is attained earlier; if fed below average, puberty is attained later; nutrition affects fat deposition and females need to have fat to draw from when pregnant Kisspeptin neurons - Correct Answer receive signals from around the brain and signals to release GnRH Social Environment - Correct Answer larger groups of females achieve puberty earlier; females housed near males achieve puberty earlier (due to pheromones) Pheromones - Correct Answer travel through the air to impact olfactory senses; brings females into estrus faster; high growth rate plan and housed with males led to earliest attainment of puberty Photoperiod/Season - Correct Answer depends on specie; long day vs short day breeders; offspring born in the wrong season take longer to attain puberty polyestrus - Correct Answer multiple cycles at all times; cow, queen, sow seasonal polyestrus - Correct Answer multiple cycles within a