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.
Â· just now. Report Abuse. Most chicken breeds start laying small eggs around 6-7 months of age. They will continue to lay well for about 2 years, then they start to taper off,...might lay 3 eggs a week then 2. Most farm people do not keep laying hens beyond 2-3 years..they go into the pot.eport Abuse. Most breeds start laying about 20-22 weeks and will lay every day or every other day for about 3 years. They will lay after that but not as much. If people arekeeping them for eggs they usually kill them and use them for stewing hens after about 3 years.