In the red backed vole (a small mouse-like mammal) there are two traits under investigation. The first trait is a distinct tuft of long hairs at the tip of the tail with a tufted tail being recessive to non-tufted tail. The letter T is used to represent the tail tuft gene. The second trait is a patch of red fur on the head which is known to be recessive to the more common lack of a red patch. The letter R is used to represent this trait. A female to be used in the cross was drawn from a pure breeding line that consistently has both the red patch on the head and a tufted tail. The female is to be crossed with a male from a highly variable wild population. The male used had no red head patch and a normal (untufted) tail. The results were as follows: 7 red head patch with tail tuft, 8 no red head patch with tail tuft, 8 red head patch without tail tuft, 8 no red head patch without tail tuft. From these data please provide the genotypes of the parents.
In the red backed vole (a small mouse-like mammal) there are two traits under investigation. The first trait is a distinct tuft of long hairs at the tip of the tail with a tufted tail being recessive to non-tufted tail. The letter T is used to represent the tail tuft gene. The second trait is a patch of red fur on the head which is known to be recessive to the more common lack of a red patch. The letter R is used to represent this trait. A female to be used in the cross was drawn from a pure breeding line that consistently has both the red patch on the head and a tufted tail. The female is to be crossed with a male from a highly variable wild population. The male used had no red head patch and a normal (untufted) tail. The results were as follows: 7 red head patch with tail tuft, 8 no red head patch with tail tuft, 8 red head patch without tail tuft, 8 no red head patch without tail tuft. From these data please provide the genotypes of the parents.
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