00:01
In butterflies, white wings are dominant to yellow wings.
00:04
So if we have capital w for white, and little w for yellow.
00:15
Okay, and we need to see the result of crossing a butterfly that has one of each, so heterozygous.
00:23
With a butterfly, there's two of the recessive allele.
00:27
Okay, so to start off with, this parent has white wings, because they have a copy of a dominant allele, and you only need one to get the dominant trait.
00:35
This one has yellow wings, because there's two copies of the recessive allule.
00:39
Let's put them into a punnet square.
00:42
So in a punnet square, you put the parental alleles on the outside, and then inside the square you combine them to see what the offspring will inherit, because the offspring are getting one allele from each parent...