Yes, the symbol 2n represents the diploid number of chromosomes in a cell. This means that there are two sets of chromosomes in the nucleus, one inherited from each parent.
Internal fertilisation.
Female gametes are called eggs or ova.
These letters represent gene combinations. If the male has two genes for one trait: AA, and the female has two genes for the same trait:aa, the offspring will get one (A) and one (a) from each and together the offspring will have Aa for its' trait. This Punnett square helps to show what the crosses will be and in what ratio.
Sex cells are also called gametes. Each has 23 chromosomes or half the number of other cells.
Scientists use the symbol "u" to represent atomic mass unit.
they use the symbol n
symbol
a star
chemical symbol
The Mayans
If you are talking about math then its usually " x " but if that is already use in the expression and you want to use another symbol to represent a DIFFERENT number then you can use y or a or so on.
The atomic symbol on the Periodic Table of Elements
American Flag
Use the " symbol, eg 4" is 4 inches.
Rectangles
You could use a great many different symbols to represent sister. You could use a daisy for example to represent a sister.