00:01
So in a fruit fly, drosophila, there is a dominant gene for gray body and recessive gene for black.
00:08
So we know that the gray is a dominant phenotype and a black is a recessive phenotype.
00:15
And another gene, there is a dominant gene for normal wings and recessive allel for vestigeal winds.
00:21
So in this case, normal is dominant allele and dominant phenotype and the vestigeal is recessive phenotype.
00:29
A male that has a hemorrhally.
00:31
Heterozygars for both genes that made it with a female that is homozygous for both recessive allele.
00:37
And the following result were observed among the offsprays.
00:42
So the black vestigeal, you see 370, a black normal wings, 130, a gray body vestigeal wing, 120, and gray with normal wing, 380.
00:57
So based on the result of this crust, the two genes are probably located.
01:04
They probably are located on the same chromosome because somehow they are linked and there are recombinant phenotypes.
01:15
So first question.
01:30
And so there are recombinant things going on.
01:33
So the second question asks you, the percentage of recombin types observed amount of offspring is.
01:39
So first of all, to figure out the recombinant type, we have to figure out what is the parental phenotype.
01:47
So we just talk about the parent.
01:50
The male is a heterozygous for both genes.
01:52
So that means that the male will show a dominant phenotype because the male has two dominant alleles.
02:02
So as we just mentioned, the dominant phenotype is gray body and normal wing.
02:18
Now this male made it with a female that is homozygars for both recessive allele.
02:24
So this means that the female will show a recessive phenotype.
02:27
The recessive will be black body and vestigeo wing.
02:43
Just to make sure this is heterozygars...