1. In fruit flies, red eyes are dominant to brown eyes, while long wings are dominant to dumpy wings. You cross a true-breeding fly with red eyes and dumpy wings to a true-breeding fly with brown eyes and long wing. A. If you cross a member of the F1 generation to a fly with dumpy wings and brown eyes, what offspring do you expect? Draw the relevant Punnett square and give phenotypic ratios.
Added by Christian W.
Step 1
Punnett square: ``` | l l ----------------- R L | RrLl RrLl R L | RrLl RrLl ``` ** Show more…
Show all steps
Your feedback will help us improve your experience
Dominador Tan and 101 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
In fruit flies, the allele for red eyes is dominant over the allele for pink eyes. Straight wings are dominant over curled wings. Imagine that a red-eyed, straight-winged fly that is heterozygous for both traits is crossed with a fly with pink eyes and curled wings. Predict the offspring that would be produced by this cross (genotypes, phenotypes, and probability of each).
Anand J.
In fruit flies, the allele for red eyes is dominant over the allele for pink eyes. Straight wings are dominant over curled wings. Imagine that a red-eyed, straight-winged fly that is heterozygous for both characteristics is mated with a fly with pink eyes and curled wings. Predict what offspring will be produced by this cross. If these two genes were on different chromosomes. When a geneticist actually carried out this mating, the results were as follows: 49% red eyes and straight wings, 49% pink eyes and curled wings, 1% red eyes and curled wings, and 1% pink eyes and straight wings. Does this agree with your prediction? How would you explain these results?
Rachel G.
You have crossed two Drosophila melanogaster individuals that have long wings and red eyes- the wild-type phenotype. In the progeny, the mutant phenotypes called curved wings and lozenge eyes appear as follows: $$\begin{array}{ll}\text { Females } & \text { Males } \\\hline 600 \text { long wings, red eyes } & 300 \text { long wings, red eyes } \\ 200 \text { curved wings, red eyes } & 100 \text { curved wings, red eyes } \\& 300 \text { long wings, lozenge eyes } \\ & 100 \text { curved wings, lozenge eyes } \\\hline\end{array}$$ According to these data, is the curved-wing allele autosomal recessive, autosomal dominant, sex-linked recessive, or sexlinked dominant? Is the lozenge-eyed allele autosomal recessive, autosomal dominant, sex-linked recessive, or sex-linked dominant? What is the genotype of the female parent? What is the genotype of the male parent?
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD