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2 indentical alleles for a trait, ex: TT , tt
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- Allele _ determines how dark the coat will be
- Use the figure below, which is from Figure 15.10. It shows the results of a cross between a fruit fly that is heterozygous for a gray body with normal wings, and a fruit fly that has a black body with vestigial wings. Because these genes are linked, the results are not what might have been predicted. Show the phenotypes and number of each type of offspring. Indicate which offspring are there combinants and which are the parental type. Finally, calculate the map distance between the two genes. Show all your work here.
- Fruit flies with one allele for curly wings (Cy) and one allele for normal wings (Cy+) have curly wings. When two curly-winged flies were crossed, 203 curly-winged and 98 normal-winged flies were obtained. In fact, all crosses between curly-winged flies produce nearly the same curly : normal ratio among the progeny. If a curly-winged fly was mated to a normal-winged fly, how many curly-winged flies would you expect among 270 total offspring?