Â· 4 years ago. A mutation is a change in the genetic material of an organism. We are made from trillions of cells, each with a nucleus composed of DNA â a set of instructions that tells the cell what to do. Cells copy themselves with astonishing accuracy, but every now and then a piece of code is copied incorrectly.
Identical (or monozygotic) twins happen when a fertilized egg splits into two separate babies-usually within the first twelve days of Mom's pregnancy. After twelve days, the egg may not split entirely and result in conjoined twins.
It is assumed that all doves/pigeons lay two eggs; that the eggs are laid 1 day apart; that the clutch always consists of 1 male & 1 female; with the first egg always being the male & the second egg laid is always the female.The eggs always hatched the same way they were laid. The eggs are always laid in the mornings.t is assumed that all doves/pigeons lay two eggs; that the eggs are laid 1 day apart; that the clutch always consists of 1 male & 1 female; with the first egg always being the male & the second egg laid is always the female. The eggs always hatched the same way they were laid. The eggs are always laid in the mornings.