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.
Original Answer: The chicken egg laying cycle lasts for exactly 21 days when the eggs will start to get cracking into chicks. Next Answer: The 21 days referred to in the prevâ¦ious answer is how long it takes a fertile chicken egg to hatch if it is incubated (either by a hen or an incubator).