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Fly Lab Report
1) Female (Wild Type) and Male (Wild Type):
Having both female and male wild type makes the offsprings dominant for both generations.
If we are going to mate both female and male wild type there is a higher possibility that all
of their offsprings will be wild type.
2) Female (Wild Type) and Male (Vestigial)
The first generation offsprings are wild type if we have female wild type and male vestigial are
mated. But in the second generation there is both wild type and vestigial offsprings. But as you can
see there are more wild type than vestigial offsprings. Which means that wild type is dominant and
vestigial is recessive. The ratio is 3:1.
3) Female (Wild Type) and Male (Apterous)
In the first generation the offsprings are all wild type when mating female wild type
with male apterous. But in the second generation there is both wild type and
apterous offsprings. The wild type is dominant and apterous is recessive because
there are more wild types. There are apterous offsprings in the second generation
because of variation happening during meiosis. Apterous are homozygous recessive.
The ratio is 3:1.
4) Female (Vestigial) and Male (Wild Type)
The first generation offsprings are wild type if we have female vestigial and male wild type are
mated. But in the second generation there is both wild type and vestigial offsprings. But as you can
see there are more vestigial than wild type offsprings. The vestigial is homozygous recessive. The
ratio is 3:1.
5) Female (vestigial) and Male (Vestigial)
Both generation of offsprings will be vestigial because both male and female are
vestigial. So, this is a homozygous offspring. The offsprings in both generations are
also dominant.
6) Female (vestigial) and Male (Apterous)
If female vestigial mates with male apterous the first generation is wild type.
However, in the second generation there are offsprings of wild type, vestigial, and
apterous. As we can see, the wild type is dominant because it has more wild type
offsprings. The ratio is 2:1:1.
7) Female apterous and male wild type
In the first generation there are only wild type offsprings. In the second generation
there are both wild type and apterous offsprings. But the wild type is dominant and
apterous is recessive. This is a heterozygous. The ratio is 3:1.
8) Female apterous and male vestigial
In the first generations the offsprings are only wild type. But in the second
generation there is wild type, vestigial, and apterous. However, the wild type is
dominant and the vestigial and apterous are recessive. The ratio is 2:1:1.
9) Female apterous and male apterous
In the first and second generation the offsprings are both apterous. This is because
the male and female fly are apterous which makes the gene homozygous dominant.
Analysis:
There are no sex-linked genes in this experiment. It may look like there are
sex- linked genes when having a vestigial wings there is one male, but when we
compare with other table. It doesn’t really make sense. So, from this we can say that
there are no sex-linked genes.
During the mating of vestigial and apterous, there were offsprings that are
wild type. The reason is because when we have two recessive allele trying to work
together either one of them can cancel each other out. This will lead to a default
wild type. So, these recessive traits are called codominant and will not work out very
well making it wild types. Vestigial and apterous are not the only ones that affect the
factor of the fly. There are plenty of different genes that control a specific trait.
Conclusion:
By looking at the results, we can predict that the wild types and vestigial will
either be wild types or vestigial offsprings after F2 generation. The reason is because
the one with the dominant trait is wild types. It is most likely to have heterozygous.
When we mate a apterous and wild type fly together it will most be heterozygous
because wild fly is dominant and apterous is recessive. So, there will be more wild
type. It is a 3:1 ratio for vestigial or apterous mating with wild type.
For the 2nd mating, the offsprings will only be wild types because both of the
parents are wild types. Wild types are also dominant so there is no way that the
offsprings can be something else besides a 100% wild type.
When we are mating a vestigial and a vestigial together the offsprings will
only be vestigial. Even though vestigial are recessive it will only be a vestigial because
both parents are vestigial. It is impossible for the child to be wild types or apterous.
When we mate a vestigial and apterous fly together it crates all their types of
fly. In F1 there is only wild types made, but in F2 there is wild types, vestigial, and
apterous. Even though there are no traits for wild type it will create about half the
number of wild type offsprings. And the other half the amount of offsprings made.