00:01
Complete a dye hybrid cross between a pea plant with white flowers and wrinkled seeds with a plant with purple flowers round seeds.
00:09
Fill in the puntet square with plant one and plant two.
00:12
Plant two is heterozygous for flower color and homozygous for seed.
00:15
What are the phenotypic ratios of the f1 generation? so i went ahead and completed the pundit square to save some time.
00:24
And it asks down here that plant number two goes down the side and i started the, the to figure out the genotype for that plant.
00:33
And it says it is heterozygous for flower color.
00:36
So that means two different alleles.
00:38
So plant number two, heterozygous.
00:42
So two different deals, one dominant, one recessive.
00:46
And then it said homozygous for seed.
00:48
Homozygous meaning same allele and round seeds are dominant.
00:54
So that is both dominant alleles.
00:58
And then plant number one.
01:04
White flowers, which are recessive.
01:08
And in order to be recessive, in order for the recessive trait to show, it has to be homozygous.
01:14
So therefore, homozygous recessive.
01:16
And same thing with seeds.
01:17
Rinkled seeds are recessive.
01:19
So homozygous recessive.
01:23
And then it kind of makes it easy for us because of plant one, it's going to give the exact same all of its offspring since it is homozygous for both traits.
01:36
So it's kind of really up to plant number two where the difference comes in.
01:43
So each row, because of plant number two, they're going to have, each row is going to have the same genotype because plant one is giving the same all of the offsprings.
01:55
So going through what are phenotypic ratios, purple flowers with round seeds, purple and round, both being dominant.
02:04
So we need at least one dominant allele from both traits.
02:08
And so we look for that.
02:10
Here's a dominant and there's a dominant.
02:11
And we know that this entire row has the same genotype...