00:01
In the first question it is given that capital b represents the dominant allele for brown eyes, whereas a small b represents the recessive allele for blue eyes.
00:19
Now we are asked to draw the pullet square that is representing the cross between genotype capital b small b and small b.
00:27
The gamets produced from this genotype will be of the type capital b small b and gamets produced from this parent will be of the type small b.
00:34
Now these gamets fertilize to produce the f1 progeny that is represented by the following purnet square.
00:41
And from this purnet square, the phenotypic ratio is calculated to be brown is to blue and this is equal to 1 is to 1.
00:54
Next genotypic ratio will be capital b small b is to small b and this is also equal to 1 is to 1.
01:06
The first question is asking about the percentage of off springs with capital b, capital b genotype.
01:13
And this is equal to 1 upon 4 multiplied by 100 which is equal to 25 % next is the percentage of offspring with capital b small b genotype and this is equal to 1 2 multiplied by 100 which is equal to 50 % next is the percentage of office spring with small b small b genotype and this is again equal to 1 upon 4 multiplied by 100 which is equal to 25 % the second question is asking about the percentage of brown -eyed off -spring and this is equal to 50%.
01:52
Next is asking the percentage of blue -eyed offspring.
01:57
And this is also equal to 50%.
02:01
In the second question, it is given that the genotype of male parent is xy, whereas the genotype of female parent is xx.
02:10
Now, when these parents are crossed, we are asked to determine the percentage of male as well as the female offspring.
02:20
So when there occurs cross between male parent with genotype xy with a female parent with genotype x x.
02:28
The gametes produced from the male parent will be of the type x and y, whereas the gametes produced from the female parent will be of the type x.
02:36
Now these gamets fertilize to produce the effron progeny that is represented by the following punez square.
02:43
And from this punez square, it can be concluded that the percentage of male offspring is equal to 2 upon 4 multiplied by 100, and this is equal to 50%.
02:54
Similarly, the percentage of female offspring will be again 2 upon 4 multiplied by 100 and this is equal to 50%.
03:04
The third question is based on the abo blood group system and the first question is asking about the dominant alleys in this system and the dominant alleys are represented as i to the power a and i to the power b.
03:21
The next question is asking to represent the xenotype using dominant alleys.
03:28
The first genotype will be ia, ia, or ia small i.
03:33
And this gives a blood group...