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.
Chicken eggs take exactly 21 days from the date they are started incubating. Hatched naturally, most broody hens will take about 6 days to gather enough eggs and then set the nest. For the next 21 days she will seldom leave the nest except for defecating and occasionally for food and water. She will not allow the eggs to drop more than a degree or two in temperature.