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.
Most hens start to lay eggs at about 6 to 8 months old. The first few eggs are usually not well formed or very small. After that they will lay according to the breed, either daily or every second day under the right conditions and with good feed. chicken can lay up to 300 eggs a year I like to plan for 280 the life span of a commerical chicken is 30 months so the most you will receive is 700 @ 280 per year.