Step-by-step explanation:
dominant genes will always appear before recessive ones, in order for recessive genes to appear, both copies of the gene have to be the recessive one tldr for this paragraph, think of dominant genes like jackets, and recessive ones like t shirts
an example
B=brown hair gene (dominant)
b=blond hair gene (recessive)
this is an example of 2 parents, with offspring
Bb Bb <-- both parents have a copy of brown and blond hair gene, but since dominant genes appear before recessive ones, they both have brown hair
now, lets look at their possible offspring genes
BB Bb Bb bb
in order, their hair color will be
brown, brown, brown, blond
see the last one? the only reason why that child is blond is because they don't have a brown hair gene tldr of this paragraph, recessive genes will only be present if both copies of the gene is the same
with the first example, lets say its a cold day. what would you wear, a jacket or a t shirt? a jacket, obviously
but what if you only had t shirts? then you would be forced to wear that and think about your poor freezing self...
pretend the T shirt is blond hair gene, and jacket is brown hair
and the closet only holds 2 clothes
2 domiant genes will do the same thing, brown hair
1 domiant gene and 1 recessive will use the domiant gene, since domiant genes get used first, like brown hair will show even though you have a copy of blond hair gene
2 recessive genes, and only then will the recessive show, like blond hair
uwu wow this took way too long to type