What Are the Parental Genotypes of Fruitflies with Mixed Phenotypes?

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In summary, the conversation discusses the genotypes of the parents of wild type and ebony body fruit flies, with a 1:1 ratio of wild type to ebony bodies and a 3:1 ratio of wild type to vestigial wings. The recommended crosses to produce these ratios are a test cross for the body phenotype and a monohybrid second generation cross for the wing phenotype. The resulting genotypes of the parents are e+e vgvg+ and ee vgvg+.
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TytoAlba95
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Homework Statement


A wild type fruitfly was crossed with another fruitfly whose phenotype was not recorded. They had progenies in the following ratios. 3/8 wild type, 3/8 ebony body, 1/8 vestigial wings and 1/8 ebony body and vestigial wing. If the genes are located on different chromosomes and ebony and vestigial wings are recessive characters find out the genotypes of the parents?

A. ee vgvg & e+e+ vg+vg
B. ee vg+vg & e+e vg+vg
C. e+e vgvg & e+e+ vg+vg
D. e+e vg+vg & e+e vg+vg

Ans: B2. The attempt at a solution

I'm stumped and need some hints to begin solving from some point.
 
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I admit I have not checked, but if you have no idea what to do writing all possible combinations down is typically the best starting point (some of them can be probably ignored immediately, others will produce different ratios).
 
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Since the ebony body and vestigial wing traits assort independently, you can break the problem down into first looking only at the ebony body phenotype and then examining the vestigial wing phenotype. What is the ratio of flies with wild type bodies vs ebony bodies? What type of cross would produce that ratio? What is the ratio of flies with wild type wings vs vestigial wings? What type of cross would produce that ratio?
 
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Sorry for the late response. Thank you so much!
I got it completely!

What is the ratio of flies with wild type bodies vs ebony bodies? 3:3 i.e. 1:1, a test cross, so e+e x ee.
What is the ratio of flies with wild type wings vs vestigial wings? 3:1 What type of cross would produce that ratio? Monohibrid second gen cross, vg+vg x vg+vg

Combining both the parental genotypes are: e+e vgvg+(wildtype) and ee vgvg+(ebony).
 

Related to What Are the Parental Genotypes of Fruitflies with Mixed Phenotypes?

1. How do fruitflies inherit genes?

Fruitflies inherit genes from both parents through sexual reproduction. Each parent contributes one set of chromosomes, which contain the genes, to the offspring.

2. What is the significance of studying fruitfly genetics?

Fruitflies have a short lifespan and produce many offspring, making them ideal for genetic studies. Many fundamental genetic principles and processes have been discovered through fruitfly research.

3. How do scientists manipulate fruitfly genetics in the lab?

Scientists use various techniques, such as genetic crosses, to manipulate the genetic makeup of fruitflies in the lab. They can also introduce mutations or alter gene expression through genetic engineering techniques.

4. Can fruitfly genetics be applied to other organisms?

Yes, many of the genetic principles and processes discovered in fruitflies can be applied to other organisms, including humans. This allows scientists to better understand and treat genetic disorders.

5. What is the current state of fruitfly genetics research?

Fruitfly genetics research is ongoing and continues to provide valuable insights into genetics and related fields such as developmental biology and evolution. New technologies and techniques are constantly being developed to further advance our understanding of fruitfly genetics.

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