BIOL 121 Study Guide - Midterm Guide: Cream Gene, Eye Color, Wild Type
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BIOL 121 Full Course Notes
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Document Summary
Wild-type drosophila melanogaster have dark red eyes and smooth, tapered bristles (these are the hairs that they have on their back). A gene?cist performed a series of crosses using d. melanogaster with the mutant eye colour phenotype scarlet (bright red) and the mutant bristle phenotype singed (singed bristles look like they have been burned). 82 females, wild-type eye colour and bristles (one is used for cross 2) 79 males, wild-type eye colour and singed bristles (one is used for cross 2) Wild-type eyes, singed bristles scarlet eyes, wild-type bristles scarlet eyes, singed bristles. Show the genotype of the parents, a punneq square represen?ng this par?cular cross, and the predicted phenotypes of the progeny (including their respec?ve ra?os). Buckskin horses have a golden yellow coat, bay horses have a red coat, and perlino horses have a coat that is almost white. A series of crosses between the three di erent types of horses produce the following progeny:
