00:01
In order to answer this question, let's talk about inheritance.
00:02
It says, following monohybroidered cross of two individuals that are heterogeneous cycles and a locus, a that is called seed shape trait.
00:09
Assume seed shape follows that gurus of wendellian inheritance with the dominant r, alix coding for ground seeds and that legislative are coding for green called seeds.
00:19
And you have this close between your heterocygoyles with a non -heterocytocytes and this is your panel square.
00:23
It says the genotypic ratio of the offspring is.
00:26
And when they ask you about the genotype criteria you have to focus on the genotypes on the different, genotypes that this all will have okay so in this case you would have how many homocygous dominants you have only one that is this one here so you have one how many heterozygotes you have one and two and how many homicides excessive only one so you have one to one guenotypic ratio and about the phenotypic ratio you have to account only for the different phenotypes in this case the homocylus domino and the heterocygoyles the three of them called for ground so you have three that are ground and only one that is this one here that goes for green culture.
01:06
So this is your phenotypic ratio.
01:08
The next question says, if you have complete dominant, then a test cross can help us find out that genotype of a parent that exhibits a dominant phenotype.
01:18
For example, a plant with ground seeds could have that genotype homotype is dominant on heterocycles.
01:25
The phenotypic ratio of the offprint that we're crossing this parent to homoseoseoseous excessive allow us to see which genotype is parent probably has, okay? so it's just.
01:36
Let's suppose you have this organism in question, okay? you don't know, you just know that this plant is bound, but you don't know if this plan is homozygous dominant or chytorocytocos.
01:46
So in order to know that genotype for this organism you have to cross, or you have to perform a test cross where you're going to cross this organism in question with a homozygolysis...