The time difference between the occurrences of two peaks is the period of the wave. The time difference between two consecutive black dots marked also gives the period of the wave. Generally, symbol ‘T’ is used to denote period in physics. Unit of measuring period is seconds (s).
The albino gene is recessive meaning that both of the parents have to be carriers for this to occur. Since the offspring is an albino it means that the parents both had the recessive gene for albanism, and their offspring had a 1 in 4 chances of being an albinoe<span />