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.
Female chickens (hens) generally start laying eggs at around 20-24 weeks of age. Some breeds take longer. They don't need a rooster to lay eggs and if you are lucky they will â¦ lay an egg per day.Again this depends on the breed, with some chickens laying an egg every few days.They lay less over winter, when they are moulting or when they are stressed.ome breeds take longer. They don't need a rooster to lay eggs and if you are lucky they will â¦ lay an egg per day. Again this depends on the breed, with some chickens laying an egg every few days. They lay less over winter, when they are moulting or when they are stressed.