1) Suppose that there was Marshak sighting of a novel rodent species, called the Marshak-scientificus s....

 

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1) Suppose that there was Marshak sighting of a novel rodent species, called the Marshak-scientificus s. A white, sharp toothed M. scientificus was mated with a brown, blunt toothed M. scientificus. The F1 progeny were as follows: 500 tan, sharp toothed 500 tan, blunt toothed. A. How many independent traits are represented with this cross? What are the trait(s)? B. What is/are the dominance pattern(s) of the traits? C. Give possible genotypes of the parents and Fl progeny. In examining M. scientificus, you realize that the animal has many unusual eye colors. You perform the following crosses. Cross 1 2 3 4 Parents blue eye X yellow eye blue eye X blue eye blue eye X black eye red eye X orange eye Progeny (ratio of phenotypes) all green 3 blue: 1 red 2 black: 1 red: 1 green 1 orange: 1 black C. What is the pattern of dominance for eye color? Make sure ALL colors are accounted for in your dominance pattern. D. What phenotypic ratio would you see if you mated the red eye parent in cross 4 with the blue eye parent in cross 3? 1) Suppose that there was Marshak sighting of a novel rodent species, called the Marshak-scientificus s. A white, sharp toothed M. scientificus was mated with a brown, blunt toothed M. scientificus. The F1 progeny were as follows: 500 tan, sharp toothed 500 tan, blunt toothed. A. How many independent traits are represented with this cross? What are the trait(s)? B. What is/are the dominance pattern(s) of the traits? C. Give possible genotypes of the parents and Fl progeny. In examining M. scientificus, you realize that the animal has many unusual eye colors. You perform the following crosses. Cross 1 2 3 4 Parents blue eye X yellow eye blue eye X blue eye blue eye X black eye red eye X orange eye Progeny (ratio of phenotypes) all green 3 blue: 1 red 2 black: 1 red: 1 green 1 orange: 1 black C. What is the pattern of dominance for eye color? Make sure ALL colors are accounted for in your dominance pattern. D. What phenotypic ratio would you see if you mated the red eye parent in cross 4 with the blue eye parent in cross 3?

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