Mendel was not the first to propose genetics however, he was the first to figure out that genes (he called them elements) came in pairs and that one member of each pair came from each parent. As a result of his realization regarding pairs of genes, Mendel determined what are called Mendel's laws of inheritance..
Chickens usually don't simply stop laying eggs when they get to a certain age, but they will lay fewer as they get older.That said, most laying breeds will lay more or less productively in backyard terms for five or seven years.hickens usually don't simply stop laying eggs when they get to a certain age, but they will lay fewer as they get older.
Good layers will sometimes lay for about 50 or 60 weeks and then go through a rest period. As daylight hours decrease, egg laying is sometimes affected; hens need about 14 hours of daylight to lay eggs.all is a normal time of year for chickens to stop laying eggs as the sunlight decreases and they molt, but 7 months is a long time. She's not that old. Another common reason is dietary, though it sounds as if your other chicken is laying.