where do the two alleles come from?

Answer 1

they come from both parents. one from each parent.

for example: heighth

lets say that being tall is the dominant allele. a dad gives a capital "T"

the mom gives a little t

since the allele pair is now Tt the offspring will be tall because being tall is dominant. the only way the child would be short is if it was tt.

Answer 2

Do you know what an allele is?? I have always found this term to be confusing for people.
An allele is a version of a gene eg brown eyes or blue eyes

A trait or characteristic is governed genes. For every gene you will have 2 copies of it ( as you get 2 complete sets of chromosomes....1 copy from your mother and one from your father).......the combination of the alleles you get will determine what you looks like etc...eg blue eyes and blue eyes or brown eyes and brown eyes or brown eyes and blue eyes.......depending on which allele is the dominant or recessive one will determine what eye colour you will have ( ok there is a bit more to eye colour than this but its a simple explanation).

Answer 3

They are genes. They just happen to be two different versions of the same gene. When fertilization occurs, you get one of the genes from your mother and one from your father. One of them might express dominance over the other, or they might both be expressed, or they might both blend, but they are essentially the same gene.

Answer 4

One from mom and one from dad.

Answer 5

meiosis