00:01
So looking at pea plants, round seeds are dominant over wrinkled.
00:05
So i'll have capital p for round, little p for wrinkles.
00:10
Just stick with the letter that they've used.
00:15
And we want to work out what happens if you cross two pea plants that are heterozygous.
00:21
So heterozygous means they each have one big and one little p.
00:26
And we're going to do the punit square.
00:30
So, yeah, the gametes are along the outside.
00:32
Like so, but we need to fill it in.
00:40
Okay, so the problem here appears to be on how it's been filled in.
00:48
So this square will get a capital p from this, a dominant allele, and a dominant allele from this.
00:56
This square gets a recessive allele from this parent and a dominant allele from this parent.
01:04
This square gets a dominant allele from this parent, so it goes there, and a recessive allele from this parent, and this one gets a recessive from each, like so...